https://ntp.niehs.nih.gov/go/5300

TDMS Study 96007-03 Pathology Tables

NTP                                    STATISTICAL ANALYSIS OF NON-NEOPLASTIC LESIONS                          REPORT: PEIRPT10     
LAB: Battelle Columbus                         TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                      DATE: 09/30/03       
EXPERIMENT: 96007 TEST: 03                                                                                     TIME: 08:58:59       
TEST TYPE:  CHRONIC                             CAGES FROM 0000 TO LAST CAGE                                   PAGE:       1        
CONT: NO1-ES-75411                              ROUTE: GAVAGE                                                  NTP C#: 96007G       
PATHOLOGIST: SELLS, DONALD                                                                                     CAS: 1746-01-6       
------------------------------------------------------------------------------------------------------------------------------------
                                                   FINAL # 3 RATS CONTROL VS STOP                                                   
               REASONS FOR REMOVAL:    25018 Dosing Accident                                                                        
                                       25019 Moribund Sacrifice                                                                     
                                       25020 Natural Death                                                                          
                                       25021 Terminal Sacrifice                                                                     
               REMOVAL DATE RANGE:     ALL                                                                                          
               TREATMENT GROUPS:       INCLUDE 001    0 NG/KG                                                                       
                                       INCLUDE 007    100 NG/ KG/STOP                                                               
NTP                                    STATISTICAL ANALYSIS OF NON-NEOPLASTIC LESIONS                          REPORT: PEIRPT10     
LAB: Battelle Columbus                         TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                      DATE: 09/30/03       
EXPERIMENT: 96007 TEST: 03                                                                                     TIME: 08:58:59       
TEST TYPE:  CHRONIC                             CAGES FROM 0000 TO LAST CAGE                                                        
CONT: NO1-ES-75411                              ROUTE: GAVAGE                                                  NTP C#: 96007G       
PATHOLOGIST: SELLS, DONALD                                                                                     CAS: 1746-01-6       
SUMMARY OF STATISTICALLY SIGNIFICANT (P<=.05) RESULTS                                                                               
IN THE ANALYSIS OF       TOXIC EQUIVALENCY FACTOR EVALUATION                                                                        
===============================================================                                                                     
Female Rats                                                                                                                         
------------                                                                                                                        
Organ                                  Morphology                                                                                   
-----                                  ----------                                                                                   
Adrenal Cortex                         Angiectasis                                                                                  
                                       Atrophy                                                                                      
                                       Degeneration Cystic                                                                          
                                       Hyperplasia                                                                                  
                                       Hypertrophy                                                                                  
                                       Necrosis                                                                                     
                                       Vacuolization Cytoplasmic                                                                    
Adrenal Medulla                        Hyperplasia                                                                                  
Bone Marrow                            Hyperplasia                                                                                  
Clitoral Gland                         Inflammation                                                                                 
Clitoral Gland: Duct                   Cyst                                                                                         
Eye: Retina                            Atrophy                                                                                      
Harderian Gland                        Inflammation                                                                                 
Heart                                  Cardiomyopathy                                                                               
Heart: Atrium                          Thrombosis                                                                                   
Intestine Large, Rectum                Parasite Metazoan                                                                            
Kidney                                 Accumulation, Hyaline Droplet                                                                
                                       Casts Protein                                                                                
                                       Cyst                                                                                         
                                       Inflammation Chronic                                                                         
                                       Mineralization                                                                               
                                       Nephropathy                                                                                  
Kidney: Pelvis                         Dilatation                                                                                   
                                       Inflammation                                                                                 
Kidney: Transitional Epithelium        Hyperplasia                                                                                  
Liver                                  Angiectasis                                                                                  
                                       Basophilic Focus                                                                             
                                       Clear Cell Focus                                                                             
                                       Congestion                                                                                   
                                       Eosinophilic Focus                                                                           
                                       Fatty Change Diffuse                                                                         
                                       Fatty Change Focal                                                                           
                                       Hematopoietic Cell Proliferation                                                             
                                       Inflammation                                                                                 
                                       Mixed Cell Focus                                                                             
                                       Necrosis                                                                                     
                                       Pigmentation                                                                                 
                                       Toxic Hepatopathy                                                                            
Liver: Bile Duct                       Cyst                                                                                         
                                       Fibrosis                                                                                     
                                       Hyperplasia                                                                                  
Liver: Centrilobular                   Degeneration                                                                                 
Liver: Hepatocyte                      Hypertrophy                                                                                  
                                       Multinucleated                                                                               
Lung                                   Infiltration Cellular Histiocyte                                                             
                                       Inflammation Granulomatous                                                                   
                                       Metaplasia                                                                                   
Lung: Alveolar Epithelium              Hyperplasia                                                                                  
NTP                                    STATISTICAL ANALYSIS OF NON-NEOPLASTIC LESIONS                          REPORT: PEIRPT10     
LAB: Battelle Columbus                         TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                      DATE: 09/30/03       
EXPERIMENT: 96007 TEST: 03                                                                                     TIME: 08:58:59       
TEST TYPE:  CHRONIC                             CAGES FROM 0000 TO LAST CAGE                                                        
CONT: NO1-ES-75411                              ROUTE: GAVAGE                                                  NTP C#: 96007G       
PATHOLOGIST: SELLS, DONALD                                                                                     CAS: 1746-01-6       
                                       Metaplasia Bronchiolar                                                                       
Lymph Node, Mandibular                 Ectasia                                                                                      
                                       Hyperplasia                                                                                  
                                       Hyperplasia Lymphoid                                                                         
Lymph Node: Lumbar                     Ectasia                                                                                      
                                       Hyperplasia                                                                                  
Mammary Gland                          Cyst                                                                                         
                                       Hyperplasia                                                                                  
Nose                                   Inflammation                                                                                 
Nose: Nasolacrimal Duct                Inflammation                                                                                 
Oral Mucosa: Gingival                  Hyperplasia                                                                                  
Ovary                                  Atrophy                                                                                      
                                       Cyst                                                                                         
Pancreas                               Inflammation Chronic                                                                         
Pancreas: Acinus                       Atrophy                                                                                      
                                       Hyperplasia                                                                                  
Pancreas: Artery                       Inflammation Chronic                                                                         
Pituitary Gland                        Angiectasis                                                                                  
                                       Vacuolization Cytoplasmic                                                                    
Pituitary Gland: Pars Distalis         Hyperplasia                                                                                  
Pituitary Gland: Pars Intermedia       Hyperplasia                                                                                  
Salivary Glands                        Atrophy                                                                                      
Spleen                                 Hematopoietic Cell Proliferation                                                             
                                       Pigmentation                                                                                 
Spleen: Lymphoid Follicle              Atrophy                                                                                      
Stomach, Forestomach                   Hyperplasia                                                                                  
                                       Inflammation                                                                                 
                                       Ulcer                                                                                        
Stomach, Glandular                     Mineralization                                                                               
Thymus                                 Atrophy                                                                                      
Thyroid Gland: C-Cell                  Hyperplasia                                                                                  
Thyroid Gland: Follicular Cell         Hyperplasia                                                                                  
                                       Hypertrophy                                                                                  
Tooth: Peridontal Tissue               Inflammation                                                                                 
Urinary Bladder                        Inflammation                                                                                 
Uterus                                 Inflammation                                                                                 
                                       Metaplasia                                                                                   
Uterus: Endometrium                    Hyperplasia Cystic                                                                           
===============================================================                                                                     
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 1       
Statistical Analysis of Non-neoplastic Lesions in        Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION         
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Adrenal Cortex                                                                                                                   | 
|     Angiectasis                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              11/53 (21%)                                       15/50 (30%)                  | 
|POLY-3 RATE (b)    |                              11/40.84                                          15/38.86                     | 
|POLY-3 PERCENT (g) |                              26.9%                                             38.6%                        | 
|TERMINAL (d)       |                              6/25 (24%)                                        10/21 (48%)                  | 
|FIRST INCIDENCE    |                              645                                               641                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.146                      | 
|POLY 3             |                                                                                P=0.188                      | 
|POLY 1.5           |                                                                                P=0.201                      | 
|POLY 6             |                                                                                P=0.164                      | 
|LOGISTIC REGRESSION|                                                                                P=0.192                      | 
|COCH-ARM / FISHERS |                                                                                P=0.197                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Adrenal Cortex                                                                                                                   | 
|     Atrophy                                                                                                                     | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         4/50 (8%)                    | 
|POLY-3 RATE (b)    |                              2/39.86                                           4/38.66                      | 
|POLY-3 PERCENT (g) |                              5.0%                                              10.4%                        | 
|TERMINAL (d)       |                              1/25 (4%)                                         3/21 (14%)                   | 
|FIRST INCIDENCE    |                              646                                               578                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.277                      | 
|POLY 3             |                                                                                P=0.324                      | 
|POLY 1.5           |                                                                                P=0.324                      | 
|POLY 6             |                                                                                P=0.320                      | 
|LOGISTIC REGRESSION|                                                                                P=0.318                      | 
|COCH-ARM / FISHERS |                                                                                P=0.312                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 2       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Adrenal Cortex                                                                                                                   | 
|     Degeneration Cystic                                                                                                         | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              11/53 (21%)                                       17/50 (34%)                  | 
|POLY-3 RATE (b)    |                              11/41.19                                          17/40.19                     | 
|POLY-3 PERCENT (g) |                              26.7%                                             42.3%                        | 
|TERMINAL (d)       |                              4/25 (16%)                                        10/21 (48%)                  | 
|FIRST INCIDENCE    |                              646                                               474                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.086                      | 
|POLY 3             |                                                                                P=0.101                      | 
|POLY 1.5           |                                                                                P=0.105                      | 
|POLY 6             |                                                                                P=0.089                      | 
|LOGISTIC REGRESSION|                                                                                P=0.104                      | 
|COCH-ARM / FISHERS |                                                                                P=0.099                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Adrenal Cortex                                                                                                                   | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              16/53 (30%)                                       20/50 (40%)                  | 
|POLY-3 RATE (b)    |                              16/41.46                                          20/40.70                     | 
|POLY-3 PERCENT (g) |                              38.6%                                             49.1%                        | 
|TERMINAL (d)       |                              10/25 (40%)                                       11/21 (52%)                  | 
|FIRST INCIDENCE    |                              487                                               578                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.155                      | 
|POLY 3             |                                                                                P=0.223                      | 
|POLY 1.5           |                                                                                P=0.222                      | 
|POLY 6             |                                                                                P=0.219                      | 
|LOGISTIC REGRESSION|                                                                                P=0.214                      | 
|COCH-ARM / FISHERS |                                                                                P=0.201                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 3       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Adrenal Cortex                                                                                                                   | 
|     Hypertrophy                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              41/53 (77%)                                       46/50 (92%)                  | 
|POLY-3 RATE (b)    |                              41/44.21                                          46/48.07                     | 
|POLY-3 PERCENT (g) |                              92.8%                                             95.7%                        | 
|TERMINAL (d)       |                              25/25 (100%)                                      21/21 (100%)                 | 
|FIRST INCIDENCE    |                              474                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.076                      | 
|POLY 3             |                                                                                P=0.404                      | 
|POLY 1.5           |                                                                                P=0.181                      | 
|POLY 6             |                                                                                P=0.769                      | 
|LOGISTIC REGRESSION|                                                                                P=0.038 *                    | 
|COCH-ARM / FISHERS |                                                                                P=0.036 *                    | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Adrenal Cortex                                                                                                                   | 
|     Necrosis                                                                                                                    | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/53 (0%)                                         3/50 (6%)                    | 
|POLY-3 RATE (b)    |                              0/39.55                                           3/39.47                      | 
|POLY-3 PERCENT (g) |                              0.0%                                              7.6%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              ---                                               578                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.119                      | 
|POLY 3             |                                                                                P=0.117                      | 
|POLY 1.5           |                                                                                P=0.116                      | 
|POLY 6             |                                                                                P=0.119                      | 
|LOGISTIC REGRESSION|                                                                                P=0.103                      | 
|COCH-ARM / FISHERS |                                                                                P=0.111                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 4       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Adrenal Cortex                                                                                                                   | 
|     Vacuolization Cytoplasmic                                                                                                   | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              11/53 (21%)                                       13/50 (26%)                  | 
|POLY-3 RATE (b)    |                              11/40.73                                          13/40.76                     | 
|POLY-3 PERCENT (g) |                              27.0%                                             31.9%                        | 
|TERMINAL (d)       |                              9/25 (36%)                                        6/21 (29%)                   | 
|FIRST INCIDENCE    |                              366                                               345                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.275                      | 
|POLY 3             |                                                                                P=0.404                      | 
|POLY 1.5           |                                                                                P=0.387                      | 
|POLY 6             |                                                                                P=0.424                      | 
|LOGISTIC REGRESSION|                                                                                P=0.364                      | 
|COCH-ARM / FISHERS |                                                                                P=0.346                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Adrenal Medulla                                                                                                                  | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              19/53 (36%)                                       15/50 (30%)                  | 
|POLY-3 RATE (b)    |                              19/41.29                                          15/39.68                     | 
|POLY-3 PERCENT (g) |                              46.0%                                             37.8%                        | 
|TERMINAL (d)       |                              11/25 (44%)                                       9/21 (43%)                   | 
|FIRST INCIDENCE    |                              487                                               578                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.429N                     | 
|POLY 3             |                                                                                P=0.297N                     | 
|POLY 1.5           |                                                                                P=0.302N                     | 
|POLY 6             |                                                                                P=0.305N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.303N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.337N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 5       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Bone Marrow                                                                                                                      | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              36/53 (68%)                                       36/50 (72%)                  | 
|POLY-3 RATE (b)    |                              36/52.64                                          36/49.61                     | 
|POLY-3 PERCENT (g) |                              68.4%                                             72.6%                        | 
|TERMINAL (d)       |                              9/25 (36%)                                        9/21 (43%)                   | 
|FIRST INCIDENCE    |                              169                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.411                      | 
|POLY 3             |                                                                                P=0.405                      | 
|POLY 1.5           |                                                                                P=0.408                      | 
|POLY 6             |                                                                                P=0.399                      | 
|LOGISTIC REGRESSION|                                                                                P=0.396                      | 
|COCH-ARM / FISHERS |                                                                                P=0.407                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Clitoral Gland                                                                                                                   | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              41/50 (82%)                                       35/49 (71%)                  | 
|POLY-3 RATE (b)    |                              41/46.36                                          35/46.06                     | 
|POLY-3 PERCENT (g) |                              88.4%                                             76.0%                        | 
|TERMINAL (d)       |                              22/25 (88%)                                       15/21 (71%)                  | 
|FIRST INCIDENCE    |                              169                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.445N                     | 
|POLY 3             |                                                                                P=0.080N                     | 
|POLY 1.5           |                                                                                P=0.094N                     | 
|POLY 6             |                                                                                P=0.091N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.150N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.157N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 6       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Clitoral Gland: Duct                                                                                                             | 
|     Cyst                                                                                                                        | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              34/50 (68%)                                       35/49 (71%)                  | 
|POLY-3 RATE (b)    |                              34/44.15                                          35/46.42                     | 
|POLY-3 PERCENT (g) |                              77.0%                                             75.4%                        | 
|TERMINAL (d)       |                              19/25 (76%)                                       14/21 (67%)                  | 
|FIRST INCIDENCE    |                              169                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.287                      | 
|POLY 3             |                                                                                P=0.525N                     | 
|POLY 1.5           |                                                                                P=0.575N                     | 
|POLY 6             |                                                                                P=0.502N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.467                      | 
|COCH-ARM / FISHERS |                                                                                P=0.440                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Eye: Retina                                                                                                                      | 
|     Atrophy                                                                                                                     | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              5/53 (9%)                                         6/50 (12%)                   | 
|POLY-3 RATE (b)    |                              5/39.55                                           6/38.82                      | 
|POLY-3 PERCENT (g) |                              12.6%                                             15.5%                        | 
|TERMINAL (d)       |                              5/25 (20%)                                        2/21 (10%)                   | 
|FIRST INCIDENCE    |                              731 (T)                                           645                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.403                      | 
|POLY 3             |                                                                                P=0.488                      | 
|POLY 1.5           |                                                                                P=0.482                      | 
|POLY 6             |                                                                                P=0.492                      | 
|LOGISTIC REGRESSION|                                                                                P=0.463                      | 
|COCH-ARM / FISHERS |                                                                                P=0.459                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 7       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Harderian Gland                                                                                                                  | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              12/53 (23%)                                       9/50 (18%)                   | 
|POLY-3 RATE (b)    |                              12/42.07                                          9/39.34                      | 
|POLY-3 PERCENT (g) |                              28.5%                                             22.9%                        | 
|TERMINAL (d)       |                              6/25 (24%)                                        5/21 (24%)                   | 
|FIRST INCIDENCE    |                              366                                               629                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.443N                     | 
|POLY 3             |                                                                                P=0.373N                     | 
|POLY 1.5           |                                                                                P=0.365N                     | 
|POLY 6             |                                                                                P=0.388N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.349N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.368N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Heart                                                                                                                            | 
|     Cardiomyopathy                                                                                                              | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              10/53 (19%)                                       22/50 (44%)                  | 
|POLY-3 RATE (b)    |                              10/41.81                                          22/41.80                     | 
|POLY-3 PERCENT (g) |                              23.9%                                             52.6%                        | 
|TERMINAL (d)       |                              6/25 (24%)                                        9/21 (43%)                   | 
|FIRST INCIDENCE    |                              169                                               520                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.007 **                   | 
|POLY 3             |                                                                                P=0.004 **                   | 
|POLY 1.5           |                                                                                P=0.004 **                   | 
|POLY 6             |                                                                                P=0.005 **                   | 
|LOGISTIC REGRESSION|                                                                                P=0.006 **                   | 
|COCH-ARM / FISHERS |                                                                                P=0.005 **                   | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 8       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Heart: Atrium                                                                                                                    | 
|     Thrombosis                                                                                                                  | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/53 (0%)                                         2/50 (4%)                    | 
|POLY-3 RATE (b)    |                              0/39.55                                           2/38.98                      | 
|POLY-3 PERCENT (g) |                              0.0%                                              5.1%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              ---                                               484                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.241                      | 
|POLY 3             |                                                                                P=0.235                      | 
|POLY 1.5           |                                                                                P=0.234                      | 
|POLY 6             |                                                                                P=0.235                      | 
|LOGISTIC REGRESSION|                                                                                P=0.213                      | 
|COCH-ARM / FISHERS |                                                                                P=0.233                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Intestine Large, Rectum                                                                                                          | 
|     Parasite Metazoan                                                                                                           | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              6/52 (12%)                                        5/50 (10%)                   | 
|POLY-3 RATE (b)    |                              6/39.78                                           5/38.80                      | 
|POLY-3 PERCENT (g) |                              15.1%                                             12.9%                        | 
|TERMINAL (d)       |                              2/25 (8%)                                         3/21 (14%)                   | 
|FIRST INCIDENCE    |                              645                                               641                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.587N                     | 
|POLY 3             |                                                                                P=0.519N                     | 
|POLY 1.5           |                                                                                P=0.515N                     | 
|POLY 6             |                                                                                P=0.534N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.518N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.528N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 9       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Kidney                                                                                                                           | 
|     Accumulation, Hyaline Droplet                                                                                               | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/53 (0%)                                         2/50 (4%)                    | 
|POLY-3 RATE (b)    |                              0/39.55                                           2/39.00                      | 
|POLY-3 PERCENT (g) |                              0.0%                                              5.1%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         1/21 (5%)                    | 
|FIRST INCIDENCE    |                              ---                                               394                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.221                      | 
|POLY 3             |                                                                                P=0.235                      | 
|POLY 1.5           |                                                                                P=0.234                      | 
|POLY 6             |                                                                                P=0.234                      | 
|LOGISTIC REGRESSION|                                                                                P=0.204                      | 
|COCH-ARM / FISHERS |                                                                                P=0.233                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Kidney                                                                                                                           | 
|     Casts Protein                                                                                                               | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              3/53 (6%)                                         1/50 (2%)                    | 
|POLY-3 RATE (b)    |                              3/40.58                                           1/38.66                      | 
|POLY-3 PERCENT (g) |                              7.4%                                              2.6%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              512                                               578                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.319N                     | 
|POLY 3             |                                                                                P=0.326N                     | 
|POLY 1.5           |                                                                                P=0.324N                     | 
|POLY 6             |                                                                                P=0.334N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.335N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.331N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 10      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Kidney                                                                                                                           | 
|     Cyst                                                                                                                        | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         0/50 (0%)                    | 
|POLY-3 RATE (b)    |                              2/39.90                                           0/38.16                      | 
|POLY-3 PERCENT (g) |                              5.0%                                              0.0%                         | 
|TERMINAL (d)       |                              1/25 (4%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              631                                               ---                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.271N                     | 
|POLY 3             |                                                                                P=0.252N                     | 
|POLY 1.5           |                                                                                P=0.250N                     | 
|POLY 6             |                                                                                P=0.257N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.246N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.262N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Kidney                                                                                                                           | 
|     Inflammation Chronic                                                                                                        | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              5/53 (9%)                                         0/50 (0%)                    | 
|POLY-3 RATE (b)    |                              5/40.43                                           0/38.16                      | 
|POLY-3 PERCENT (g) |                              12.4%                                             0.0%                         | 
|TERMINAL (d)       |                              4/25 (16%)                                        0/21 (0%)                    | 
|FIRST INCIDENCE    |                              361                                               ---                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.047N*                    | 
|POLY 3             |                                                                                P=0.036N*                    | 
|POLY 1.5           |                                                                                P=0.035N*                    | 
|POLY 6             |                                                                                P=0.037N*                    | 
|LOGISTIC REGRESSION|                                                                                P=0.038N*                    | 
|COCH-ARM / FISHERS |                                                                                P=0.033N*                    | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 11      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Kidney                                                                                                                           | 
|     Mineralization                                                                                                              | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              40/53 (75%)                                       42/50 (84%)                  | 
|POLY-3 RATE (b)    |                              40/47.18                                          42/46.21                     | 
|POLY-3 PERCENT (g) |                              84.8%                                             90.9%                        | 
|TERMINAL (d)       |                              22/25 (88%)                                       19/21 (91%)                  | 
|FIRST INCIDENCE    |                              169                                               394                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.202                      | 
|POLY 3             |                                                                                P=0.256                      | 
|POLY 1.5           |                                                                                P=0.207                      | 
|POLY 6             |                                                                                P=0.358                      | 
|LOGISTIC REGRESSION|                                                                                P=0.247                      | 
|COCH-ARM / FISHERS |                                                                                P=0.204                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Kidney                                                                                                                           | 
|     Nephropathy                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              34/53 (64%)                                       41/50 (82%)                  | 
|POLY-3 RATE (b)    |                              34/45.60                                          41/45.19                     | 
|POLY-3 PERCENT (g) |                              74.6%                                             90.7%                        | 
|TERMINAL (d)       |                              21/25 (84%)                                       20/21 (95%)                  | 
|FIRST INCIDENCE    |                              169                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.047 *                    | 
|POLY 3             |                                                                                P=0.023 *                    | 
|POLY 1.5           |                                                                                P=0.024 *                    | 
|POLY 6             |                                                                                P=0.028 *                    | 
|LOGISTIC REGRESSION|                                                                                P=0.041 *                    | 
|COCH-ARM / FISHERS |                                                                                P=0.034 *                    | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 12      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Kidney: Pelvis                                                                                                                   | 
|     Dilatation                                                                                                                  | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         1/50 (2%)                    | 
|POLY-3 RATE (b)    |                              2/40.16                                           1/38.87                      | 
|POLY-3 PERCENT (g) |                              5.0%                                              2.6%                         | 
|TERMINAL (d)       |                              1/25 (4%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              533                                               484                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.520N                     | 
|POLY 3             |                                                                                P=0.515N                     | 
|POLY 1.5           |                                                                                P=0.515N                     | 
|POLY 6             |                                                                                P=0.520N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.542N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.522N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Kidney: Pelvis                                                                                                                   | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         0/50 (0%)                    | 
|POLY-3 RATE (b)    |                              2/39.55                                           0/38.16                      | 
|POLY-3 PERCENT (g) |                              5.1%                                              0.0%                         | 
|TERMINAL (d)       |                              2/25 (8%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              731 (T)                                           ---                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.277N                     | 
|POLY 3             |                                                                                P=0.248N                     | 
|POLY 1.5           |                                                                                P=0.249N                     | 
|POLY 6             |                                                                                P=0.251N                     | 
|LOGISTIC REGRESSION|                                                                                (e)                          | 
|COCH-ARM / FISHERS |                                                                                P=0.262N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 13      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Kidney: Transitional Epithelium                                                                                                  | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              3/53 (6%)                                         5/50 (10%)                   | 
|POLY-3 RATE (b)    |                              3/40.54                                           5/39.18                      | 
|POLY-3 PERCENT (g) |                              7.4%                                              12.8%                        | 
|TERMINAL (d)       |                              2/25 (8%)                                         1/21 (5%)                    | 
|FIRST INCIDENCE    |                              169                                               584                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.318                      | 
|POLY 3             |                                                                                P=0.338                      | 
|POLY 1.5           |                                                                                P=0.335                      | 
|POLY 6             |                                                                                P=0.341                      | 
|LOGISTIC REGRESSION|                                                                                P=0.316                      | 
|COCH-ARM / FISHERS |                                                                                P=0.325                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Angiectasis                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         4/50 (8%)                    | 
|POLY-3 RATE (b)    |                              2/39.55                                           4/38.16                      | 
|POLY-3 PERCENT (g) |                              5.1%                                              10.5%                        | 
|TERMINAL (d)       |                              2/25 (8%)                                         4/21 (19%)                   | 
|FIRST INCIDENCE    |                              731 (T)                                           731 (T)                      | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.254                      | 
|POLY 3             |                                                                                P=0.322                      | 
|POLY 1.5           |                                                                                P=0.323                      | 
|POLY 6             |                                                                                P=0.317                      | 
|LOGISTIC REGRESSION|                                                                                P=0.254                      | 
|COCH-ARM / FISHERS |                                                                                P=0.312                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 14      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Basophilic Focus                                                                                                            | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              12/53 (23%)                                       16/50 (32%)                  | 
|POLY-3 RATE (b)    |                              12/42.33                                          16/39.93                     | 
|POLY-3 PERCENT (g) |                              28.4%                                             40.1%                        | 
|TERMINAL (d)       |                              4/25 (16%)                                        7/21 (33%)                   | 
|FIRST INCIDENCE    |                              492                                               520                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.183                      | 
|POLY 3             |                                                                                P=0.184                      | 
|POLY 1.5           |                                                                                P=0.199                      | 
|POLY 6             |                                                                                P=0.162                      | 
|LOGISTIC REGRESSION|                                                                                P=0.213                      | 
|COCH-ARM / FISHERS |                                                                                P=0.199                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Clear Cell Focus                                                                                                            | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              5/53 (9%)                                         8/50 (16%)                   | 
|POLY-3 RATE (b)    |                              5/40.18                                           8/38.16                      | 
|POLY-3 PERCENT (g) |                              12.4%                                             21.0%                        | 
|TERMINAL (d)       |                              3/25 (12%)                                        8/21 (38%)                   | 
|FIRST INCIDENCE    |                              548                                               731 (T)                      | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.180                      | 
|POLY 3             |                                                                                P=0.240                      | 
|POLY 1.5           |                                                                                P=0.247                      | 
|POLY 6             |                                                                                P=0.225                      | 
|LOGISTIC REGRESSION|                                                                                P=0.236                      | 
|COCH-ARM / FISHERS |                                                                                P=0.240                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 15      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Congestion                                                                                                                  | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         0/50 (0%)                    | 
|POLY-3 RATE (b)    |                              2/39.85                                           0/38.16                      | 
|POLY-3 PERCENT (g) |                              5.0%                                              0.0%                         | 
|TERMINAL (d)       |                              1/25 (4%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              648                                               ---                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.269N                     | 
|POLY 3             |                                                                                P=0.251N                     | 
|POLY 1.5           |                                                                                P=0.250N                     | 
|POLY 6             |                                                                                P=0.257N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.246N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.262N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Eosinophilic Focus                                                                                                          | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              11/53 (21%)                                       27/50 (54%)                  | 
|POLY-3 RATE (b)    |                              11/40.67                                          27/43.77                     | 
|POLY-3 PERCENT (g) |                              27.1%                                             61.7%                        | 
|TERMINAL (d)       |                              6/25 (24%)                                        12/21 (57%)                  | 
|FIRST INCIDENCE    |                              645                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P<0.001 **                   | 
|POLY 3             |                                                                                P<0.001 **                   | 
|POLY 1.5           |                                                                                P<0.001 **                   | 
|POLY 6             |                                                                                P<0.001 **                   | 
|LOGISTIC REGRESSION|                                                                                P<0.001 **                   | 
|COCH-ARM / FISHERS |                                                                                P<0.001 **                   | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 16      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Fatty Change Diffuse                                                                                                        | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/53 (0%)                                         10/50 (20%)                  | 
|POLY-3 RATE (b)    |                              0/39.55                                           10/40.49                     | 
|POLY-3 PERCENT (g) |                              0.0%                                              24.7%                        | 
|TERMINAL (d)       |                              0/25 (0%)                                         3/21 (14%)                   | 
|FIRST INCIDENCE    |                              ---                                               520                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P<0.001 **                   | 
|POLY 3             |                                                                                P<0.001 **                   | 
|POLY 1.5           |                                                                                P<0.001 **                   | 
|POLY 6             |                                                                                P<0.001 **                   | 
|LOGISTIC REGRESSION|                                                                                P<0.001 **                   | 
|COCH-ARM / FISHERS |                                                                                P<0.001 **                   | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Fatty Change Focal                                                                                                          | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         8/50 (16%)                   | 
|POLY-3 RATE (b)    |                              2/39.69                                           8/38.49                      | 
|POLY-3 PERCENT (g) |                              5.0%                                              20.8%                        | 
|TERMINAL (d)       |                              1/25 (4%)                                         6/21 (29%)                   | 
|FIRST INCIDENCE    |                              694                                               645                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.028 *                    | 
|POLY 3             |                                                                                P=0.038 *                    | 
|POLY 1.5           |                                                                                P=0.039 *                    | 
|POLY 6             |                                                                                P=0.035 *                    | 
|LOGISTIC REGRESSION|                                                                                P=0.036 *                    | 
|COCH-ARM / FISHERS |                                                                                P=0.037 *                    | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 17      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Hematopoietic Cell Proliferation                                                                                            | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              1/53 (2%)                                         2/50 (4%)                    | 
|POLY-3 RATE (b)    |                              1/39.86                                           2/38.27                      | 
|POLY-3 PERCENT (g) |                              2.5%                                              5.2%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         1/21 (5%)                    | 
|FIRST INCIDENCE    |                              646                                               702                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.464                      | 
|POLY 3             |                                                                                P=0.490                      | 
|POLY 1.5           |                                                                                P=0.491                      | 
|POLY 6             |                                                                                P=0.487                      | 
|LOGISTIC REGRESSION|                                                                                P=0.486                      | 
|COCH-ARM / FISHERS |                                                                                P=0.478                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              33/53 (62%)                                       43/50 (86%)                  | 
|POLY-3 RATE (b)    |                              33/47.21                                          43/46.89                     | 
|POLY-3 PERCENT (g) |                              69.9%                                             91.7%                        | 
|TERMINAL (d)       |                              17/25 (68%)                                       20/21 (95%)                  | 
|FIRST INCIDENCE    |                              351                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.026 *                    | 
|POLY 3             |                                                                                P=0.004 **                   | 
|POLY 1.5           |                                                                                P=0.004 **                   | 
|POLY 6             |                                                                                P=0.004 **                   | 
|LOGISTIC REGRESSION|                                                                                P=0.007 **                   | 
|COCH-ARM / FISHERS |                                                                                P=0.005 **                   | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 18      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Mixed Cell Focus                                                                                                            | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              30/53 (57%)                                       29/50 (58%)                  | 
|POLY-3 RATE (b)    |                              30/41.81                                          29/41.58                     | 
|POLY-3 PERCENT (g) |                              71.8%                                             69.8%                        | 
|TERMINAL (d)       |                              22/25 (88%)                                       19/21 (91%)                  | 
|FIRST INCIDENCE    |                              492                                               474                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.333                      | 
|POLY 3             |                                                                                P=0.518N                     | 
|POLY 1.5           |                                                                                P=0.555N                     | 
|POLY 6             |                                                                                P=0.479N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.590                      | 
|COCH-ARM / FISHERS |                                                                                P=0.522                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Necrosis                                                                                                                    | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              1/53 (2%)                                         8/50 (16%)                   | 
|POLY-3 RATE (b)    |                              1/39.67                                           8/40.81                      | 
|POLY-3 PERCENT (g) |                              2.5%                                              19.6%                        | 
|TERMINAL (d)       |                              0/25 (0%)                                         1/21 (5%)                    | 
|FIRST INCIDENCE    |                              701                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.019 *                    | 
|POLY 3             |                                                                                P=0.016 *                    | 
|POLY 1.5           |                                                                                P=0.016 *                    | 
|POLY 6             |                                                                                P=0.016 *                    | 
|LOGISTIC REGRESSION|                                                                                P=0.012 *                    | 
|COCH-ARM / FISHERS |                                                                                P=0.012 *                    | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 19      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Pigmentation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              4/53 (8%)                                         45/50 (90%)                  | 
|POLY-3 RATE (b)    |                              4/40.41                                           45/47.82                     | 
|POLY-3 PERCENT (g) |                              9.9%                                              94.1%                        | 
|TERMINAL (d)       |                              1/25 (4%)                                         20/21 (95%)                  | 
|FIRST INCIDENCE    |                              533                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P<0.001 **                   | 
|POLY 3             |                                                                                P<0.001 **                   | 
|POLY 1.5           |                                                                                P<0.001 **                   | 
|POLY 6             |                                                                                P<0.001 **                   | 
|LOGISTIC REGRESSION|                                                                                P<0.001 **                   | 
|COCH-ARM / FISHERS |                                                                                P<0.001 **                   | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Toxic Hepatopathy                                                                                                           | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/53 (0%)                                         16/50 (32%)                  | 
|POLY-3 RATE (b)    |                              0/39.55                                           16/40.19                     | 
|POLY-3 PERCENT (g) |                              0.0%                                              39.8%                        | 
|TERMINAL (d)       |                              0/25 (0%)                                         9/21 (43%)                   | 
|FIRST INCIDENCE    |                              ---                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P<0.001 **                   | 
|POLY 3             |                                                                                P<0.001 **                   | 
|POLY 1.5           |                                                                                P<0.001 **                   | 
|POLY 6             |                                                                                P<0.001 **                   | 
|LOGISTIC REGRESSION|                                                                                P<0.001 **                   | 
|COCH-ARM / FISHERS |                                                                                P<0.001 **                   | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 20      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver: Bile Duct                                                                                                                 | 
|     Cyst                                                                                                                        | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              3/53 (6%)                                         6/50 (12%)                   | 
|POLY-3 RATE (b)    |                              3/39.85                                           6/38.64                      | 
|POLY-3 PERCENT (g) |                              7.5%                                              15.5%                        | 
|TERMINAL (d)       |                              2/25 (8%)                                         3/21 (14%)                   | 
|FIRST INCIDENCE    |                              648                                               643                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.194                      | 
|POLY 3             |                                                                                P=0.225                      | 
|POLY 1.5           |                                                                                P=0.226                      | 
|POLY 6             |                                                                                P=0.221                      | 
|LOGISTIC REGRESSION|                                                                                P=0.218                      | 
|COCH-ARM / FISHERS |                                                                                P=0.216                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver: Bile Duct                                                                                                                 | 
|     Fibrosis                                                                                                                    | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/53 (0%)                                         5/50 (10%)                   | 
|POLY-3 RATE (b)    |                              0/39.55                                           5/38.27                      | 
|POLY-3 PERCENT (g) |                              0.0%                                              13.1%                        | 
|TERMINAL (d)       |                              0/25 (0%)                                         4/21 (19%)                   | 
|FIRST INCIDENCE    |                              ---                                               702                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.023 *                    | 
|POLY 3             |                                                                                P=0.027 *                    | 
|POLY 1.5           |                                                                                P=0.028 *                    | 
|POLY 6             |                                                                                P=0.026 *                    | 
|LOGISTIC REGRESSION|                                                                                P=0.026 *                    | 
|COCH-ARM / FISHERS |                                                                                P=0.024 *                    | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 21      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver: Bile Duct                                                                                                                 | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              5/53 (9%)                                         7/50 (14%)                   | 
|POLY-3 RATE (b)    |                              5/40.16                                           7/39.33                      | 
|POLY-3 PERCENT (g) |                              12.5%                                             17.8%                        | 
|TERMINAL (d)       |                              4/25 (16%)                                        2/21 (10%)                   | 
|FIRST INCIDENCE    |                              533                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.318                      | 
|POLY 3             |                                                                                P=0.363                      | 
|POLY 1.5           |                                                                                P=0.364                      | 
|POLY 6             |                                                                                P=0.356                      | 
|LOGISTIC REGRESSION|                                                                                P=0.349                      | 
|COCH-ARM / FISHERS |                                                                                P=0.339                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver: Centrilobular                                                                                                             | 
|     Degeneration                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         0/50 (0%)                    | 
|POLY-3 RATE (b)    |                              2/39.97                                           0/38.16                      | 
|POLY-3 PERCENT (g) |                              5.0%                                              0.0%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              648                                               ---                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.250N                     | 
|POLY 3             |                                                                                P=0.252N                     | 
|POLY 1.5           |                                                                                P=0.251N                     | 
|POLY 6             |                                                                                P=0.259N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.247N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.262N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 22      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver: Hepatocyte                                                                                                                | 
|     Hypertrophy                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/53 (0%)                                         22/50 (44%)                  | 
|POLY-3 RATE (b)    |                              0/39.55                                           22/43.28                     | 
|POLY-3 PERCENT (g) |                              0.0%                                              50.8%                        | 
|TERMINAL (d)       |                              0/25 (0%)                                         9/21 (43%)                   | 
|FIRST INCIDENCE    |                              ---                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P<0.001 **                   | 
|POLY 3             |                                                                                P<0.001 **                   | 
|POLY 1.5           |                                                                                P<0.001 **                   | 
|POLY 6             |                                                                                P<0.001 **                   | 
|LOGISTIC REGRESSION|                                                                                P<0.001 **                   | 
|COCH-ARM / FISHERS |                                                                                P<0.001 **                   | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver: Hepatocyte                                                                                                                | 
|     Multinucleated                                                                                                              | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/53 (0%)                                         32/50 (64%)                  | 
|POLY-3 RATE (b)    |                              0/39.55                                           32/43.19                     | 
|POLY-3 PERCENT (g) |                              0.0%                                              74.1%                        | 
|TERMINAL (d)       |                              0/25 (0%)                                         16/21 (76%)                  | 
|FIRST INCIDENCE    |                              ---                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P<0.001 **                   | 
|POLY 3             |                                                                                P<0.001 **                   | 
|POLY 1.5           |                                                                                P<0.001 **                   | 
|POLY 6             |                                                                                P<0.001 **                   | 
|LOGISTIC REGRESSION|                                                                                P<0.001 **                   | 
|COCH-ARM / FISHERS |                                                                                P<0.001 **                   | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 23      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Lung                                                                                                                             | 
|     Infiltration Cellular Histiocyte                                                                                            | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              41/53 (77%)                                       41/50 (82%)                  | 
|POLY-3 RATE (b)    |                              41/48.55                                          41/44.42                     | 
|POLY-3 PERCENT (g) |                              84.5%                                             92.3%                        | 
|TERMINAL (d)       |                              19/25 (76%)                                       19/21 (91%)                  | 
|FIRST INCIDENCE    |                              351                                               520                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.314                      | 
|POLY 3             |                                                                                P=0.185                      | 
|POLY 1.5           |                                                                                P=0.261                      | 
|POLY 6             |                                                                                P=0.141                      | 
|LOGISTIC REGRESSION|                                                                                P=0.463                      | 
|COCH-ARM / FISHERS |                                                                                P=0.368                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Lung                                                                                                                             | 
|     Inflammation Granulomatous                                                                                                  | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         0/50 (0%)                    | 
|POLY-3 RATE (b)    |                              2/39.90                                           0/38.16                      | 
|POLY-3 PERCENT (g) |                              5.0%                                              0.0%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              645                                               ---                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.260N                     | 
|POLY 3             |                                                                                P=0.251N                     | 
|POLY 1.5           |                                                                                P=0.250N                     | 
|POLY 6             |                                                                                P=0.257N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.246N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.262N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 24      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Lung                                                                                                                             | 
|     Metaplasia                                                                                                                  | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              1/53 (2%)                                         3/50 (6%)                    | 
|POLY-3 RATE (b)    |                              1/39.55                                           3/39.10                      | 
|POLY-3 PERCENT (g) |                              2.5%                                              7.7%                         | 
|TERMINAL (d)       |                              1/25 (4%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              731 (T)                                           578                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.293                      | 
|POLY 3             |                                                                                P=0.301                      | 
|POLY 1.5           |                                                                                P=0.298                      | 
|POLY 6             |                                                                                P=0.303                      | 
|LOGISTIC REGRESSION|                                                                                P=0.289                      | 
|COCH-ARM / FISHERS |                                                                                P=0.287                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Lung: Alveolar Epithelium                                                                                                        | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              12/53 (23%)                                       0/50 (0%)                    | 
|POLY-3 RATE (b)    |                              12/40.71                                          0/38.16                      | 
|POLY-3 PERCENT (g) |                              29.5%                                             0.0%                         | 
|TERMINAL (d)       |                              6/25 (24%)                                        0/21 (0%)                    | 
|FIRST INCIDENCE    |                              645                                               ---                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P<0.001N**                   | 
|POLY 3             |                                                                                P<0.001N**                   | 
|POLY 1.5           |                                                                                P<0.001N**                   | 
|POLY 6             |                                                                                P<0.001N**                   | 
|LOGISTIC REGRESSION|                                                                                P<0.001N**                   | 
|COCH-ARM / FISHERS |                                                                                P<0.001N**                   | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 25      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Lung: Alveolar Epithelium                                                                                                        | 
|     Metaplasia Bronchiolar                                                                                                      | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         31/50 (62%)                  | 
|POLY-3 RATE (b)    |                              2/39.55                                           31/41.68                     | 
|POLY-3 PERCENT (g) |                              5.1%                                              74.4%                        | 
|TERMINAL (d)       |                              2/25 (8%)                                         16/21 (76%)                  | 
|FIRST INCIDENCE    |                              731 (T)                                           578                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P<0.001 **                   | 
|POLY 3             |                                                                                P<0.001 **                   | 
|POLY 1.5           |                                                                                P<0.001 **                   | 
|POLY 6             |                                                                                P<0.001 **                   | 
|LOGISTIC REGRESSION|                                                                                P<0.001 **                   | 
|COCH-ARM / FISHERS |                                                                                P<0.001 **                   | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Lymph Node, Mandibular                                                                                                           | 
|     Ectasia                                                                                                                     | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/51 (0%)                                         2/49 (4%)                    | 
|POLY-3 RATE (b)    |                              0/38.56                                           2/37.52                      | 
|POLY-3 PERCENT (g) |                              0.0%                                              5.3%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         2/21 (10%)                   | 
|FIRST INCIDENCE    |                              ---                                               731 (T)                      | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.200                      | 
|POLY 3             |                                                                                P=0.233                      | 
|POLY 1.5           |                                                                                P=0.234                      | 
|POLY 6             |                                                                                P=0.231                      | 
|LOGISTIC REGRESSION|                                                                                P=0.200                      | 
|COCH-ARM / FISHERS |                                                                                P=0.238                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 26      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Lymph Node, Mandibular                                                                                                           | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              25/51 (49%)                                       30/49 (61%)                  | 
|POLY-3 RATE (b)    |                              25/42.13                                          30/42.19                     | 
|POLY-3 PERCENT (g) |                              59.3%                                             71.1%                        | 
|TERMINAL (d)       |                              16/25 (64%)                                       15/21 (71%)                  | 
|FIRST INCIDENCE    |                              366                                               410                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.105                      | 
|POLY 3             |                                                                                P=0.169                      | 
|POLY 1.5           |                                                                                P=0.170                      | 
|POLY 6             |                                                                                P=0.160                      | 
|LOGISTIC REGRESSION|                                                                                P=0.163                      | 
|COCH-ARM / FISHERS |                                                                                P=0.153                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Lymph Node, Mandibular                                                                                                           | 
|     Hyperplasia Lymphoid                                                                                                        | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/51 (0%)                                         2/49 (4%)                    | 
|POLY-3 RATE (b)    |                              0/38.56                                           2/37.52                      | 
|POLY-3 PERCENT (g) |                              0.0%                                              5.3%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         2/21 (10%)                   | 
|FIRST INCIDENCE    |                              ---                                               731 (T)                      | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.200                      | 
|POLY 3             |                                                                                P=0.233                      | 
|POLY 1.5           |                                                                                P=0.234                      | 
|POLY 6             |                                                                                P=0.231                      | 
|LOGISTIC REGRESSION|                                                                                P=0.200                      | 
|COCH-ARM / FISHERS |                                                                                P=0.238                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 27      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Lymph Node: Lumbar                                                                                                               | 
|     Ectasia                                                                                                                     | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              1/2 (50%)                                         2/5 (40%)                    | 
|POLY-3 RATE (b)    |                              1/2.00                                            2/3.67                       | 
|POLY-3 PERCENT (g) |                              50.0%                                             54.5%                        | 
|TERMINAL (d)       |                              0/1 (0%)                                          0/0 (0%)                     | 
|FIRST INCIDENCE    |                              717                                               578                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.484                      | 
|POLY 3             |                                                                                P=0.668                      | 
|POLY 1.5           |                                                                                P=0.666N                     | 
|POLY 6             |                                                                                P=0.625                      | 
|LOGISTIC REGRESSION|                                                                                P=0.842N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.714N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Lymph Node: Lumbar                                                                                                               | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/2 (0%)                                          2/5 (40%)                    | 
|POLY-3 RATE (b)    |                              0/1.94                                            2/3.89                       | 
|POLY-3 PERCENT (g) |                              0.0%                                              51.4%                        | 
|TERMINAL (d)       |                              0/1 (0%)                                          0/0 (0%)                     | 
|FIRST INCIDENCE    |                              ---                                               474                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.256                      | 
|POLY 3             |                                                                                P=0.245                      | 
|POLY 1.5           |                                                                                P=0.276                      | 
|POLY 6             |                                                                                P=0.199                      | 
|LOGISTIC REGRESSION|                                                                                P=0.999                      | 
|COCH-ARM / FISHERS |                                                                                P=0.476                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 28      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Mammary Gland                                                                                                                    | 
|     Cyst                                                                                                                        | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              4/53 (8%)                                         4/50 (8%)                    | 
|POLY-3 RATE (b)    |                              4/41.40                                           4/38.27                      | 
|POLY-3 PERCENT (g) |                              9.7%                                              10.5%                        | 
|TERMINAL (d)       |                              0/25 (0%)                                         3/21 (14%)                   | 
|FIRST INCIDENCE    |                              366                                               702                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.577                      | 
|POLY 3             |                                                                                P=0.606                      | 
|POLY 1.5           |                                                                                P=0.614                      | 
|POLY 6             |                                                                                P=0.591                      | 
|LOGISTIC REGRESSION|                                                                                P=0.613                      | 
|COCH-ARM / FISHERS |                                                                                P=0.609                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Mammary Gland                                                                                                                    | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              25/53 (47%)                                       19/50 (38%)                  | 
|POLY-3 RATE (b)    |                              25/44.58                                          19/40.90                     | 
|POLY-3 PERCENT (g) |                              56.1%                                             46.5%                        | 
|TERMINAL (d)       |                              13/25 (52%)                                       9/21 (43%)                   | 
|FIRST INCIDENCE    |                              487                                               410                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.340N                     | 
|POLY 3             |                                                                                P=0.247N                     | 
|POLY 1.5           |                                                                                P=0.223N                     | 
|POLY 6             |                                                                                P=0.297N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.198N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.229N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 29      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Nose                                                                                                                             | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         1/50 (2%)                    | 
|POLY-3 RATE (b)    |                              2/40.42                                           1/38.16                      | 
|POLY-3 PERCENT (g) |                              5.0%                                              2.6%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         1/21 (5%)                    | 
|FIRST INCIDENCE    |                              474                                               731 (T)                      | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.530N                     | 
|POLY 3             |                                                                                P=0.527N                     | 
|POLY 1.5           |                                                                                P=0.522N                     | 
|POLY 6             |                                                                                P=0.537N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.523N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.522N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Nose: Nasolacrimal Duct                                                                                                          | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         1/50 (2%)                    | 
|POLY-3 RATE (b)    |                              2/40.42                                           1/38.80                      | 
|POLY-3 PERCENT (g) |                              5.0%                                              2.6%                         | 
|TERMINAL (d)       |                              1/25 (4%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              366                                               520                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.520N                     | 
|POLY 3             |                                                                                P=0.519N                     | 
|POLY 1.5           |                                                                                P=0.519N                     | 
|POLY 6             |                                                                                P=0.522N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.562N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.522N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 30      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Oral Mucosa: Gingival                                                                                                            | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              1/2 (50%)                                         8/11 (73%)                   | 
|POLY-3 RATE (b)    |                              1/1.13                                            8/10.01                      | 
|POLY-3 PERCENT (g) |                              88.9%                                             80.0%                        | 
|TERMINAL (d)       |                              1/1 (100%)                                        2/2 (100%)                   | 
|FIRST INCIDENCE    |                              731 (T)                                           345                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.019 *                    | 
|POLY 3             |                                                                                P=0.551N                     | 
|POLY 1.5           |                                                                                P=0.586                      | 
|POLY 6             |                                                                                P=0.522N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.663                      | 
|COCH-ARM / FISHERS |                                                                                P=0.538                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Ovary                                                                                                                            | 
|     Atrophy                                                                                                                     | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              49/51 (96%)                                       45/49 (92%)                  | 
|POLY-3 RATE (b)    |                              49/50.31                                          45/46.77                     | 
|POLY-3 PERCENT (g) |                              97.4%                                             96.2%                        | 
|TERMINAL (d)       |                              24/25 (96%)                                       20/21 (95%)                  | 
|FIRST INCIDENCE    |                              169                                               345                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.497                      | 
|POLY 3             |                                                                                P=0.617N                     | 
|POLY 1.5           |                                                                                P=0.529N                     | 
|POLY 6             |                                                                                P=0.682N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.266N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.320N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 31      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Ovary                                                                                                                            | 
|     Cyst                                                                                                                        | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              14/51 (27%)                                       16/49 (33%)                  | 
|POLY-3 RATE (b)    |                              14/40.42                                          16/40.78                     | 
|POLY-3 PERCENT (g) |                              34.6%                                             39.2%                        | 
|TERMINAL (d)       |                              10/25 (40%)                                       5/21 (24%)                   | 
|FIRST INCIDENCE    |                              533                                               578                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.298                      | 
|POLY 3             |                                                                                P=0.420                      | 
|POLY 1.5           |                                                                                P=0.401                      | 
|POLY 6             |                                                                                P=0.449                      | 
|LOGISTIC REGRESSION|                                                                                P=0.376                      | 
|COCH-ARM / FISHERS |                                                                                P=0.363                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Oviduct                                                                                                                          | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/2 (100%)                                        2/2 (100%)                   | 
|POLY-3 RATE (b)    |                              2/2.00                                            2/2.00                       | 
|POLY-3 PERCENT (g) |                              100.0%                                            100.0%                       | 
|TERMINAL (d)       |                              1/1 (100%)                                        1/1 (100%)                   | 
|FIRST INCIDENCE    |                              717                                               643                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                (e)                          | 
|POLY 3             |                                                                                (e)                          | 
|POLY 1.5           |                                                                                (e)                          | 
|POLY 6             |                                                                                (e)                          | 
|LOGISTIC REGRESSION|                                                                                (e)                          | 
|COCH-ARM / FISHERS |                                                                                (e)                          | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 32      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Pancreas                                                                                                                         | 
|     Inflammation Chronic                                                                                                        | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/51 (0%)                                         4/49 (8%)                    | 
|POLY-3 RATE (b)    |                              0/38.86                                           4/37.98                      | 
|POLY-3 PERCENT (g) |                              0.0%                                              10.5%                        | 
|TERMINAL (d)       |                              0/25 (0%)                                         3/21 (14%)                   | 
|FIRST INCIDENCE    |                              ---                                               673                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.046 *                    | 
|POLY 3             |                                                                                P=0.057                      | 
|POLY 1.5           |                                                                                P=0.057                      | 
|POLY 6             |                                                                                P=0.056                      | 
|LOGISTIC REGRESSION|                                                                                P=0.055                      | 
|COCH-ARM / FISHERS |                                                                                P=0.054                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Pancreas: Acinus                                                                                                                 | 
|     Atrophy                                                                                                                     | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              1/51 (2%)                                         4/49 (8%)                    | 
|POLY-3 RATE (b)    |                              1/38.86                                           4/37.98                      | 
|POLY-3 PERCENT (g) |                              2.6%                                              10.5%                        | 
|TERMINAL (d)       |                              1/25 (4%)                                         3/21 (14%)                   | 
|FIRST INCIDENCE    |                              731 (T)                                           673                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.136                      | 
|POLY 3             |                                                                                P=0.171                      | 
|POLY 1.5           |                                                                                P=0.172                      | 
|POLY 6             |                                                                                P=0.168                      | 
|LOGISTIC REGRESSION|                                                                                P=0.161                      | 
|COCH-ARM / FISHERS |                                                                                P=0.169                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 33      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Pancreas: Acinus                                                                                                                 | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/51 (4%)                                         0/49 (0%)                    | 
|POLY-3 RATE (b)    |                              2/39.17                                           0/37.76                      | 
|POLY-3 PERCENT (g) |                              5.1%                                              0.0%                         | 
|TERMINAL (d)       |                              1/25 (4%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              646                                               ---                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.279N                     | 
|POLY 3             |                                                                                P=0.249N                     | 
|POLY 1.5           |                                                                                P=0.247N                     | 
|POLY 6             |                                                                                P=0.255N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.244N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.258N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Pancreas: Artery                                                                                                                 | 
|     Inflammation Chronic                                                                                                        | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/51 (0%)                                         2/49 (4%)                    | 
|POLY-3 RATE (b)    |                              0/38.86                                           2/38.73                      | 
|POLY-3 PERCENT (g) |                              0.0%                                              5.2%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         1/21 (5%)                    | 
|FIRST INCIDENCE    |                              ---                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.219                      | 
|POLY 3             |                                                                                P=0.236                      | 
|POLY 1.5           |                                                                                P=0.236                      | 
|POLY 6             |                                                                                P=0.235                      | 
|LOGISTIC REGRESSION|                                                                                P=0.180                      | 
|COCH-ARM / FISHERS |                                                                                P=0.238                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 34      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Pituitary Gland                                                                                                                  | 
|     Angiectasis                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              25/53 (47%)                                       15/50 (30%)                  | 
|POLY-3 RATE (b)    |                              25/42.71                                          15/39.36                     | 
|POLY-3 PERCENT (g) |                              58.5%                                             38.1%                        | 
|TERMINAL (d)       |                              14/25 (56%)                                       8/21 (38%)                   | 
|FIRST INCIDENCE    |                              474                                               614                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.115N                     | 
|POLY 3             |                                                                                P=0.044N*                    | 
|POLY 1.5           |                                                                                P=0.043N*                    | 
|POLY 6             |                                                                                P=0.055N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.037N*                    | 
|COCH-ARM / FISHERS |                                                                                P=0.056N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Pituitary Gland                                                                                                                  | 
|     Vacuolization Cytoplasmic                                                                                                   | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/53 (0%)                                         3/50 (6%)                    | 
|POLY-3 RATE (b)    |                              0/39.55                                           3/38.38                      | 
|POLY-3 PERCENT (g) |                              0.0%                                              7.8%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         2/21 (10%)                   | 
|FIRST INCIDENCE    |                              ---                                               673                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.099                      | 
|POLY 3             |                                                                                P=0.114                      | 
|POLY 1.5           |                                                                                P=0.114                      | 
|POLY 6             |                                                                                P=0.113                      | 
|LOGISTIC REGRESSION|                                                                                P=0.111                      | 
|COCH-ARM / FISHERS |                                                                                P=0.111                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 35      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Pituitary Gland: Pars Distalis                                                                                                   | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              19/53 (36%)                                       18/50 (36%)                  | 
|POLY-3 RATE (b)    |                              19/43.37                                          18/40.67                     | 
|POLY-3 PERCENT (g) |                              43.8%                                             44.3%                        | 
|TERMINAL (d)       |                              11/25 (44%)                                       9/21 (43%)                   | 
|FIRST INCIDENCE    |                              487                                               578                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.497                      | 
|POLY 3             |                                                                                P=0.575                      | 
|POLY 1.5           |                                                                                P=0.587                      | 
|POLY 6             |                                                                                P=0.558                      | 
|LOGISTIC REGRESSION|                                                                                P=0.559N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.575                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Pituitary Gland: Pars Intermedia                                                                                                 | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         0/50 (0%)                    | 
|POLY-3 RATE (b)    |                              2/40.18                                           0/38.16                      | 
|POLY-3 PERCENT (g) |                              5.0%                                              0.0%                         | 
|TERMINAL (d)       |                              1/25 (4%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              526                                               ---                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.259N                     | 
|POLY 3             |                                                                                P=0.254N                     | 
|POLY 1.5           |                                                                                P=0.252N                     | 
|POLY 6             |                                                                                P=0.260N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.253N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.262N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 36      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Salivary Glands                                                                                                                  | 
|     Atrophy                                                                                                                     | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              0/51 (0%)                                         2/49 (4%)                    | 
|POLY-3 RATE (b)    |                              0/38.56                                           2/37.63                      | 
|POLY-3 PERCENT (g) |                              0.0%                                              5.3%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         1/21 (5%)                    | 
|FIRST INCIDENCE    |                              ---                                               702                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.224                      | 
|POLY 3             |                                                                                P=0.234                      | 
|POLY 1.5           |                                                                                P=0.234                      | 
|POLY 6             |                                                                                P=0.232                      | 
|LOGISTIC REGRESSION|                                                                                P=0.225                      | 
|COCH-ARM / FISHERS |                                                                                P=0.238                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Spleen                                                                                                                           | 
|     Hematopoietic Cell Proliferation                                                                                            | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              46/51 (90%)                                       42/49 (86%)                  | 
|POLY-3 RATE (b)    |                              46/47.32                                          42/45.72                     | 
|POLY-3 PERCENT (g) |                              97.2%                                             91.9%                        | 
|TERMINAL (d)       |                              25/25 (100%)                                      21/21 (100%)                 | 
|FIRST INCIDENCE    |                              185                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.491                      | 
|POLY 3             |                                                                                P=0.198N                     | 
|POLY 1.5           |                                                                                P=0.225N                     | 
|POLY 6             |                                                                                P=0.213N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.273N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.352N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 37      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Spleen                                                                                                                           | 
|     Pigmentation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              45/51 (88%)                                       42/49 (86%)                  | 
|POLY-3 RATE (b)    |                              45/49.73                                          42/45.30                     | 
|POLY-3 PERCENT (g) |                              90.5%                                             92.7%                        | 
|TERMINAL (d)       |                              23/25 (92%)                                       20/21 (95%)                  | 
|FIRST INCIDENCE    |                              169                                               215                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.447                      | 
|POLY 3             |                                                                                P=0.499                      | 
|POLY 1.5           |                                                                                P=0.592                      | 
|POLY 6             |                                                                                P=0.447                      | 
|LOGISTIC REGRESSION|                                                                                P=0.446N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.469N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Spleen: Lymphoid Follicle                                                                                                        | 
|     Atrophy                                                                                                                     | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              4/51 (8%)                                         1/49 (2%)                    | 
|POLY-3 RATE (b)    |                              4/42.10                                           1/38.40                      | 
|POLY-3 PERCENT (g) |                              9.5%                                              2.6%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              169                                               520                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.198N                     | 
|POLY 3             |                                                                                P=0.213N                     | 
|POLY 1.5           |                                                                                P=0.205N                     | 
|POLY 6             |                                                                                P=0.223N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.238N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.194N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 38      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Stomach, Forestomach                                                                                                             | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              3/53 (6%)                                         5/50 (10%)                   | 
|POLY-3 RATE (b)    |                              3/39.67                                           5/40.27                      | 
|POLY-3 PERCENT (g) |                              7.6%                                              12.4%                        | 
|TERMINAL (d)       |                              2/25 (8%)                                         1/21 (5%)                    | 
|FIRST INCIDENCE    |                              701                                               474                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.314                      | 
|POLY 3             |                                                                                P=0.362                      | 
|POLY 1.5           |                                                                                P=0.352                      | 
|POLY 6             |                                                                                P=0.371                      | 
|LOGISTIC REGRESSION|                                                                                P=0.324                      | 
|COCH-ARM / FISHERS |                                                                                P=0.325                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Stomach, Forestomach                                                                                                             | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              1/53 (2%)                                         4/50 (8%)                    | 
|POLY-3 RATE (b)    |                              1/40.42                                           4/40.11                      | 
|POLY-3 PERCENT (g) |                              2.5%                                              10.0%                        | 
|TERMINAL (d)       |                              0/25 (0%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              366                                               474                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.170                      | 
|POLY 3             |                                                                                P=0.175                      | 
|POLY 1.5           |                                                                                P=0.172                      | 
|POLY 6             |                                                                                P=0.178                      | 
|LOGISTIC REGRESSION|                                                                                P=0.123                      | 
|COCH-ARM / FISHERS |                                                                                P=0.164                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 39      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Stomach, Forestomach                                                                                                             | 
|     Ulcer                                                                                                                       | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/53 (4%)                                         4/50 (8%)                    | 
|POLY-3 RATE (b)    |                              2/40.54                                           4/40.51                      | 
|POLY-3 PERCENT (g) |                              4.9%                                              9.9%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              366                                               474                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.331                      | 
|POLY 3             |                                                                                P=0.336                      | 
|POLY 1.5           |                                                                                P=0.330                      | 
|POLY 6             |                                                                                P=0.340                      | 
|LOGISTIC REGRESSION|                                                                                P=0.252                      | 
|COCH-ARM / FISHERS |                                                                                P=0.312                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Stomach, Glandular                                                                                                               | 
|     Mineralization                                                                                                              | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              3/53 (6%)                                         0/50 (0%)                    | 
|POLY-3 RATE (b)    |                              3/41.09                                           0/38.16                      | 
|POLY-3 PERCENT (g) |                              7.3%                                              0.0%                         | 
|TERMINAL (d)       |                              0/25 (0%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              169                                               ---                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.144N                     | 
|POLY 3             |                                                                                P=0.136N                     | 
|POLY 1.5           |                                                                                P=0.134N                     | 
|POLY 6             |                                                                                P=0.143N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.158N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.132N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 40      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Thymus                                                                                                                           | 
|     Atrophy                                                                                                                     | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              36/51 (71%)                                       45/49 (92%)                  | 
|POLY-3 RATE (b)    |                              36/45.37                                          45/46.27                     | 
|POLY-3 PERCENT (g) |                              79.3%                                             97.3%                        | 
|TERMINAL (d)       |                              20/25 (80%)                                       21/21 (100%)                 | 
|FIRST INCIDENCE    |                              169                                               410                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.031 *                    | 
|POLY 3             |                                                                                P=0.004 **                   | 
|POLY 1.5           |                                                                                P=0.003 **                   | 
|POLY 6             |                                                                                P=0.009 **                   | 
|LOGISTIC REGRESSION|                                                                                P=0.008 **                   | 
|COCH-ARM / FISHERS |                                                                                P=0.006 **                   | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Thyroid Gland: C-Cell                                                                                                            | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              19/52 (37%)                                       15/49 (31%)                  | 
|POLY-3 RATE (b)    |                              19/40.39                                          15/42.18                     | 
|POLY-3 PERCENT (g) |                              47.0%                                             35.6%                        | 
|TERMINAL (d)       |                              12/25 (48%)                                       4/21 (19%)                   | 
|FIRST INCIDENCE    |                              646                                               410                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.417N                     | 
|POLY 3             |                                                                                P=0.196N                     | 
|POLY 1.5           |                                                                                P=0.239N                     | 
|POLY 6             |                                                                                P=0.164N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.310N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.338N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 41      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Thyroid Gland: Follicular Cell                                                                                                   | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              2/52 (4%)                                         0/49 (0%)                    | 
|POLY-3 RATE (b)    |                              2/38.90                                           0/37.52                      | 
|POLY-3 PERCENT (g) |                              5.1%                                              0.0%                         | 
|TERMINAL (d)       |                              2/25 (8%)                                         0/21 (0%)                    | 
|FIRST INCIDENCE    |                              731 (T)                                           ---                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.277N                     | 
|POLY 3             |                                                                                P=0.249N                     | 
|POLY 1.5           |                                                                                P=0.249N                     | 
|POLY 6             |                                                                                P=0.251N                     | 
|LOGISTIC REGRESSION|                                                                                (e)                          | 
|COCH-ARM / FISHERS |                                                                                P=0.263N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Thyroid Gland: Follicular Cell                                                                                                   | 
|     Hypertrophy                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              3/52 (6%)                                         6/49 (12%)                   | 
|POLY-3 RATE (b)    |                              3/39.78                                           6/38.56                      | 
|POLY-3 PERCENT (g) |                              7.5%                                              15.6%                        | 
|TERMINAL (d)       |                              2/25 (8%)                                         3/21 (14%)                   | 
|FIRST INCIDENCE    |                              361                                               474                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.196                      | 
|POLY 3             |                                                                                P=0.225                      | 
|POLY 1.5           |                                                                                P=0.225                      | 
|POLY 6             |                                                                                P=0.223                      | 
|LOGISTIC REGRESSION|                                                                                P=0.217                      | 
|COCH-ARM / FISHERS |                                                                                P=0.215                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 42      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Tooth: Peridontal Tissue                                                                                                         | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              15/16 (94%)                                       12/12 (100%)                 | 
|POLY-3 RATE (b)    |                              15/15.64                                          12/12.00                     | 
|POLY-3 PERCENT (g) |                              95.9%                                             100.0%                       | 
|TERMINAL (d)       |                              9/9 (100%)                                        5/5 (100%)                   | 
|FIRST INCIDENCE    |                              185                                               345                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.461                      | 
|POLY 3             |                                                                                P=0.810                      | 
|POLY 1.5           |                                                                                P=0.709                      | 
|POLY 6             |                                                                                P=0.964                      | 
|LOGISTIC REGRESSION|                                                                                P=0.550                      | 
|COCH-ARM / FISHERS |                                                                                P=0.571                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Urinary Bladder                                                                                                                  | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              6/52 (12%)                                        2/50 (4%)                    | 
|POLY-3 RATE (b)    |                              6/39.16                                           2/38.52                      | 
|POLY-3 PERCENT (g) |                              15.3%                                             5.2%                         | 
|TERMINAL (d)       |                              4/25 (16%)                                        0/21 (0%)                    | 
|FIRST INCIDENCE    |                              697                                               645                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.179N                     | 
|POLY 3             |                                                                                P=0.136N                     | 
|POLY 1.5           |                                                                                P=0.137N                     | 
|POLY 6             |                                                                                P=0.138N                     | 
|LOGISTIC REGRESSION|                                                                                P=0.144N                     | 
|COCH-ARM / FISHERS |                                                                                P=0.148N                     | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 43      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Uterus                                                                                                                           | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              7/52 (13%)                                        9/50 (18%)                   | 
|POLY-3 RATE (b)    |                              7/40.38                                           9/40.44                      | 
|POLY-3 PERCENT (g) |                              17.3%                                             22.3%                        | 
|TERMINAL (d)       |                              4/25 (16%)                                        4/21 (19%)                   | 
|FIRST INCIDENCE    |                              185                                               484                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.307                      | 
|POLY 3             |                                                                                P=0.391                      | 
|POLY 1.5           |                                                                                P=0.381                      | 
|POLY 6             |                                                                                P=0.399                      | 
|LOGISTIC REGRESSION|                                                                                P=0.362                      | 
|COCH-ARM / FISHERS |                                                                                P=0.360                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Uterus                                                                                                                           | 
|     Metaplasia                                                                                                                  | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              29/52 (56%)                                       33/50 (66%)                  | 
|POLY-3 RATE (b)    |                              29/45.30                                          33/45.46                     | 
|POLY-3 PERCENT (g) |                              64.0%                                             72.6%                        | 
|TERMINAL (d)       |                              15/25 (60%)                                       16/21 (76%)                  | 
|FIRST INCIDENCE    |                              351                                               394                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.161                      | 
|POLY 3             |                                                                                P=0.248                      | 
|POLY 1.5           |                                                                                P=0.230                      | 
|POLY 6             |                                                                                P=0.275                      | 
|LOGISTIC REGRESSION|                                                                                P=0.212                      | 
|COCH-ARM / FISHERS |                                                                                P=0.196                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
       Date:  09/30/03                           EXPERIMENT: 96007 TEST: 03                                            Page 44      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -        TOXIC EQUIVALENCY FACTOR EVALUATION          
                                         Terminal Sacrifice at 105 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                              0 NG/KG                                           100 NG/                      | 
|                   |                                                                                KG/STOP                      | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Uterus: Endometrium                                                                                                              | 
|     Hyperplasia Cystic                                                                                                          | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                              30/52 (58%)                                       32/50 (64%)                  | 
|POLY-3 RATE (b)    |                              30/44.70                                          32/42.21                     | 
|POLY-3 PERCENT (g) |                              67.1%                                             75.8%                        | 
|TERMINAL (d)       |                              15/25 (60%)                                       18/21 (86%)                  | 
|FIRST INCIDENCE    |                              361                                               474                          | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                                                                                P=0.226                      | 
|POLY 3             |                                                                                P=0.244                      | 
|POLY 1.5           |                                                                                P=0.294                      | 
|POLY 6             |                                                                                P=0.180                      | 
|LOGISTIC REGRESSION|                                                                                P=0.372                      | 
|COCH-ARM / FISHERS |                                                                                P=0.327                      | 
|ORDER RESTRICTED   |                                                                                (e)                          | 
|=================================================================================================================================| 
(a)  Number of tumor-bearing animals /  number of animals examined at site.                                                         
(b)  Number of tumor-bearing animals / Poly-3 number                                                                                
(d)  Observed incidence at terminal kill.                                                                                           
(f)  Beneath the control incidence are the P-values associated with the trend                                                       
test.  Beneath the dosed group incidence are the P-values corresponding to                                                          
pairwise comparisons between the controls and that dosed group.  The life                                                           
table analysis regards tumors in animals dying prior to  terminal kill as                                                           
 being (directly or indirectly) the cause of death.                                                                                 
Logistic regression is an alternative                                                                                               
 method for analyzing the incidence of non-fatal tumors. The Cochran-Armitage                                                       
and Fishers exact tests compare directly the overall incidence rates                                                                
For all tests a negative trend is indicated by N                                                                                    
(e)  Value of Statistic cannot be computed.                                                                                         
(g)  Poly-3 adjusted lifetime tumor incidence.                                                                                      
(I)  Interim sacrifice                                                                                                              
(T)  Terminal sacrifice                                                                                                             
#   Tumor rates based on number of animals necropsied.                                                                              
*   To the right of any statistical result, indicates significance at (P<=0.05).                                                    
**  To the right of any statistical result, indicates significance at (P<=0.01).