https://ntp.niehs.nih.gov/go/2115

TR 349 Mouse Pathology Tables

NTP                                        STATISTICAL ANALYSIS OF PRIMARY TUMORS                              REPORT: PEIRPT08     
LAB: Battelle Columbus                               DOWICIDE EC-7 PENTACHLOROPHENOL                           DATE: 09/09/94       
EXPERIMENT: 05074 TEST: 01                                                                                     TIME: 06:57:58       
TEST TYPE:  CHRONIC                             CAGES FROM 0000 TO LAST CAGE                                   PAGE:       1        
CONT: N01-ES-38068          ROUTE: DOSED FEED                                                                  NTP C#: 55389        
PATHOLOGIST: R. PERSING                      S. EUSTIS                                                         CAS: 87-86-5         
------------------------------------------------------------------------------------------------------------------------------------
               REASONS FOR REMOVAL:    ALL                                                                                          
               REMOVAL DATE RANGE:     ALL                                                                                          
               TREATMENT GROUPS:       INCLUDE ALL                                                                                  
NTP                                        STATISTICAL ANALYSIS OF PRIMARY TUMORS                              REPORT: PEIRPT08    
LAB: Battelle Columbus                               DOWICIDE EC-7 PENTACHLOROPHENOL                           DATE: 09/09/94      
EXPERIMENT: 05074 TEST: 01                                                                                     TIME: 06:57:58      
TEST TYPE:  CHRONIC                             CAGES FROM 0000 TO LAST CAGE                                                       
CONT: N01-ES-38068          ROUTE: DOSED FEED                                                                  NTP C#: 55389       
PATHOLOGIST: R. PERSING                      S. EUSTIS                                                         CAS: 87-86-5        
                                                    MICE(B6C3F1)
                                              ----------------------------
             FOR ALL DOSES THE TUMOR RATES IN THE FOLLOWING TISSUES/ORGANS ARE BASED ON NUMBER OF TISSUES EXAMINED.
             IN OTHER TISSUES/ORGANS, RATES ARE BASED ON NUMBER OF ANIMALS NECROPSIED.
                                                    ----------------
                                                    Adrenal Gland
                                                    Bone Marrow
                                                    Brain
                                                    Epididymis
                                                    Gallbladder
                                                    Heart
                                                    Islets, Pancreatic
                                                    Kidney
                                                    Liver
                                                    Lung
                                                    Nose
                                                    Ovary
                                                    Pancreas
                                                    Parathyroid Gland
                                                    Pituitary Gland
                                                    Preputial Gland
                                                    Prostate
                                                    Salivary Glands
                                                    Spleen
                                                    Testes
                                                    Thymus
                                                    Thyroid Gland
                                                    Urinary Bladder
NTP                                        STATISTICAL ANALYSIS OF PRIMARY TUMORS                              REPORT: PEIRPT08     
LAB: Battelle Columbus                               DOWICIDE EC-7 PENTACHLOROPHENOL                           DATE: 09/09/94       
EXPERIMENT: 05074 TEST: 01                                                                                     TIME: 06:57:58       
TEST TYPE:  CHRONIC                             CAGES FROM 0000 TO LAST CAGE                                                        
CONT: N01-ES-38068          ROUTE: DOSED FEED                                                                  NTP C#: 55389        
PATHOLOGIST: R. PERSING                      S. EUSTIS                                                         CAS: 87-86-5         
                                     SUMMARY OF STATISTICALLY SIGNIFICANT (P<=.05) RESULTS
                                IN THE ANALYSIS OF THE STUDY OF DOWICIDE EC-7 PENTACHLOROPHENOL
              ====================================================================================================
                                                           MALE MICE
                                                          -------------
                                 ORGAN                               MORPHOLOGY
                                -------                             ------------
                             Adrenal Medulla               Pheochromocytoma Benign
                                                           Pheochromocytoma: Benign, Complex, Malignant, NOS
                             Liver                         Hepatocellular Adenoma
                                                           Hepatocellular Carcinoma
                                                           Hepatocellular Carcinoma or Hepatocellular Adenoma
                                                           Hepatocellular Carcinoma, Hepatocellular Adenoma, or Hepatoblastoma
                             Lung                          Alveolar/Bronchiolar Carcinoma or Alveolar/Bronchiolar Adenoma
                             Spleen                        Hemangiosarcoma
                             All Organs                    Benign Tumors
                                                           Malignant Tumors
                                                           Malignant and Benign Tumors
              ====================================================================================================
                                                           FEMALE MICE
                                                          -------------
                                 ORGAN                               MORPHOLOGY
                                -------                             ------------
                             Adrenal Medulla               Pheochromocytoma Benign
                                                           Pheochromocytoma: Benign, Complex, Malignant, NOS
                             Islets, Pancreatic            Carcinoma
                             Liver                         Hemangiosarcoma
                                                           Hepatocellular Adenoma
                                                           Hepatocellular Carcinoma or Hepatocellular Adenoma
                                                           Hepatocellular Carcinoma, Hepatocellular Adenoma, or Hepatoblastoma
                             Lung                          Alveolar/Bronchiolar Adenoma
                                                           Alveolar/Bronchiolar Carcinoma or Alveolar/Bronchiolar Adenoma
                             Pituitary Gland: Pars Distalis or Unspecified Site
                                                           Adenoma
                             All Organs                    Hemangiosarcoma
                                                           Hemangiosarcoma or Hemangioma
                                                           Benign Tumors
                                                           Malignant and Benign Tumors
              ====================================================================================================
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE   1
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|Adrenal Gland: Non-medullary, Non-cortical                                                                                       |
|     Adenoma                                                                                                                     |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  0/34 (0%)    1/48 (2%)    0/49 (0%)    0/49 (0%)  |  0/35 (0%)    2/50 (4%)    0/47 (0%)    0/49 (0%)  |
|ADJUSTED (b)           |   0.0%         3.6%         0.0%         0.0%      |   0.0%         7.1%         0.0%         0.0%      |
|TERMINAL (d)           |  0/25 (0%)    1/28 (4%)    0/29 (0%)    0/35 (0%)  |  0/29 (0%)    2/28 (7%)    0/38 (0%)    0/39 (0%)  |
|FIRST INCIDENCE (DAYS) |   ---          727 (T)      ---          ---       |   ---          727 (T)      ---          ---       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.579N     P=0.523        (e)          (e)      |  P=0.375N     P=0.230        (e)          (e)      |
|INCIDENTAL TUMOR       |  P=0.579N     P=0.523        (e)          (e)      |  P=0.375N     P=0.230        (e)          (e)      |
|LOGISTIC REGRESSION    |  P=0.579N     P=0.523        (e)          (e)      |  P=0.375N     P=0.230        (e)          (e)      |
|COCHRAN-ARMITAGE       |  P=0.597N                                          |  P=0.397N                                          |
|FISHER EXACT           |               P=0.585        (e)          (e)      |               P=0.343        (e)          (e)      |
|=================================================================================================================================|
|                                                                                                                                 |
|Adrenal Medulla                                                                                                                  |
|     Pheochromocytoma Benign                                                                                                     |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  0/34 (0%)    4/48 (8%)   21/48 (44%)  44/49 (90%) |  0/35 (0%)    1/49 (2%)    2/46 (4%)   38/49 (78%) |
|ADJUSTED (b)           |   0.0%        13.8%        67.5%        97.8%      |   0.0%         3.6%         5.3%        86.3%      |
|TERMINAL (d)           |  0/25 (0%)    3/28 (11%)  19/29 (66%)  34/35 (97%) |  0/29 (0%)    1/28 (4%)    2/38 (5%)   33/39 (85%) |
|FIRST INCIDENCE (DAYS) |   ---          723          598          458       |   ---          727 (T)      727 (T)      555       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P<0.001 **   P=0.081      P<0.001 **   P<0.001 ** |  P<0.001 **   P=0.493      P=0.299      P<0.001 ** |
|INCIDENTAL TUMOR       |  P<0.001 **   P=0.107      P<0.001 **   P<0.001 ** |  P<0.001 **   P=0.493      P=0.299      P<0.001 ** |
|LOGISTIC REGRESSION    |  P<0.001 **   P=0.079      P<0.001 **   P<0.001 ** |  P<0.001 **   P=0.493      P=0.299      P<0.001 ** |
|COCHRAN-ARMITAGE       |  P<0.001 **                                        |  P<0.001 **                                        |
|FISHER EXACT           |               P=0.111      P<0.001 **   P<0.001 ** |               P=0.583      P=0.319      P<0.001 ** |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE   2
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|Adrenal Medulla                                                                                                                  |
|     Pheochromocytoma Malignant                                                                                                  |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  1/34 (3%)    0/48 (0%)    0/48 (0%)    3/49 (6%)  |  0/35 (0%)    1/49 (2%)    0/46 (0%)    1/49 (2%)  |
|ADJUSTED (b)           |   4.0%         0.0%         0.0%         8.6%      |   0.0%         3.6%         0.0%         2.6%      |
|TERMINAL (d)           |  1/25 (4%)    0/28 (0%)    0/29 (0%)    3/35 (9%)  |  0/29 (0%)    1/28 (4%)    0/38 (0%)    1/39 (3%)  |
|FIRST INCIDENCE (DAYS) |   727 (T)      ---          ---          727 (T)   |   ---          727 (T)      ---          727 (T)   |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.104      P=0.477N     P=0.470N     P=0.431    |  P=0.505      P=0.493        (e)        P=0.559    |
|INCIDENTAL TUMOR       |  P=0.104      P=0.477N     P=0.470N     P=0.431    |  P=0.505      P=0.493        (e)        P=0.559    |
|LOGISTIC REGRESSION    |  P=0.104      P=0.477N     P=0.470N     P=0.431    |  P=0.505      P=0.493        (e)        P=0.559    |
|COCHRAN-ARMITAGE       |  P=0.084                                           |  P=0.483                                           |
|FISHER EXACT           |               P=0.415N     P=0.415N     P=0.456    |               P=0.583        (e)        P=0.583    |
|=================================================================================================================================|
|                                                                                                                                 |
|Adrenal Medulla                                                                                                                  |
|     Pheochromocytoma: Benign, Complex, Malignant, NOS                                                                           |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  1/34 (3%)    4/48 (8%)   21/48 (44%)  45/49 (92%) |  0/35 (0%)    2/49 (4%)    2/46 (4%)   38/49 (78%) |
|ADJUSTED (b)           |   4.0%        13.8%        67.5%       100.0%      |   0.0%         7.1%         5.3%        86.3%      |
|TERMINAL (d)           |  1/25 (4%)    3/28 (11%)  19/29 (66%)  35/35 (100%)|  0/29 (0%)    2/28 (7%)    2/38 (5%)   33/39 (85%) |
|FIRST INCIDENCE (DAYS) |   727 (T)      723          598          458       |   ---          727 (T)      727 (T)      555       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P<0.001 **   P=0.218      P<0.001 **   P<0.001 ** |  P<0.001 **   P=0.230      P=0.299      P<0.001 ** |
|INCIDENTAL TUMOR       |  P<0.001 **   P=0.268      P<0.001 **   P<0.001 ** |  P<0.001 **   P=0.230      P=0.299      P<0.001 ** |
|LOGISTIC REGRESSION    |  P<0.001 **   P=0.219      P<0.001 **   P<0.001 ** |  P<0.001 **   P=0.230      P=0.299      P<0.001 ** |
|COCHRAN-ARMITAGE       |  P<0.001 **                                        |  P<0.001 **                                        |
|FISHER EXACT           |               P=0.305      P<0.001 **   P<0.001 ** |               P=0.337      P=0.319      P<0.001 ** |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE   3
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|Harderian Gland                                                                                                                  |
|     Adenoma                                                                                                                     |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  2/35 (6%)    1/50 (2%)    0/50 (0%)    3/49 (6%)  |  2/35 (6%)    1/50 (2%)    1/50 (2%)    3/49 (6%)  |
|ADJUSTED (b)           |   8.0%         3.6%         0.0%         7.9%      |   6.9%         3.6%         2.6%         7.7%      |
|TERMINAL (d)           |  2/25 (8%)    1/28 (4%)    0/29 (0%)    2/35 (6%)  |  2/29 (7%)    1/28 (4%)    1/38 (3%)    3/39 (8%)  |
|FIRST INCIDENCE (DAYS) |   727 (T)      727 (T)      ---          604       |   727 (T)      727 (T)      727 (T)      727 (T)   |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.375      P=0.460N     P=0.206N     P=0.658    |  P=0.412      P=0.512N     P=0.406N     P=0.634    |
|INCIDENTAL TUMOR       |  P=0.390      P=0.460N     P=0.206N     P=0.569N   |  P=0.412      P=0.512N     P=0.406N     P=0.634    |
|LOGISTIC REGRESSION    |  P=0.354      P=0.460N     P=0.206N     P=0.660    |  P=0.412      P=0.512N     P=0.406N     P=0.634    |
|COCHRAN-ARMITAGE       |  P=0.322                                           |  P=0.360                                           |
|FISHER EXACT           |               P=0.367N     P=0.167N     P=0.657    |               P=0.367N     P=0.367N     P=0.657    |
|=================================================================================================================================|
|                                                                                                                                 |
|Islets, Pancreatic                                                                                                               |
|     Carcinoma                                                                                                                   |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  0/34 (0%)    0/11 (0%)    0/14 (0%)    0/49 (0%)  |  0/34 (0%)    2/16 (13%)   0/5 (0%)     0/46 (0%)  |
|ADJUSTED (b)           |   0.0%         0.0%         0.0%         0.0%      |   0.0%       100.0%         0.0%         0.0%      |
|TERMINAL (d)           |  0/25 (0%)    0/0          0/0          0/35 (0%)  |  0/29 (0%)    2/2 (100%)   0/0          0/39 (0%)  |
|FIRST INCIDENCE (DAYS) |   ---          ---          ---          ---       |   ---          727 (T)      ---          ---       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |    (e)          (e)          (e)          (e)      |  P=0.254N     P<0.001 **     (e)          (e)      |
|INCIDENTAL TUMOR       |    (e)          (e)          (e)          (e)      |  P=0.254N     P<0.001 **     (e)          (e)      |
|LOGISTIC REGRESSION    |    (e)          (e)          (e)          (e)      |  P=0.254N     P<0.001 **     (e)          (e)      |
|COCHRAN-ARMITAGE       |    (e)                                             |  P=0.306N                                          |
|FISHER EXACT           |                 (e)          (e)          (e)      |               P=0.098        (e)          (e)      |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE   4
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|Liver                                                                                                                            |
|     Hemangioma                                                                                                                  |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  1/35 (3%)    0/48 (0%)    1/48 (2%)    2/49 (4%)  |  0/34 (0%)    0/50 (0%)    0/49 (0%)    1/48 (2%)  |
|ADJUSTED (b)           |   4.0%         0.0%         3.4%         5.7%      |   0.0%         0.0%         0.0%         2.6%      |
|TERMINAL (d)           |  1/25 (4%)    0/28 (0%)    1/29 (3%)    2/35 (6%)  |  0/29 (0%)    0/28 (0%)    0/38 (0%)    1/39 (3%)  |
|FIRST INCIDENCE (DAYS) |   727 (T)      ---          727 (T)      727 (T)   |   ---          ---          ---          727 (T)   |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.344      P=0.477N     P=0.729N     P=0.617    |  P=0.264        (e)          (e)        P=0.559    |
|INCIDENTAL TUMOR       |  P=0.344      P=0.477N     P=0.729N     P=0.617    |  P=0.264        (e)          (e)        P=0.559    |
|LOGISTIC REGRESSION    |  P=0.344      P=0.477N     P=0.729N     P=0.617    |  P=0.264        (e)          (e)        P=0.559    |
|COCHRAN-ARMITAGE       |  P=0.308                                           |  P=0.240                                           |
|FISHER EXACT           |               P=0.422N     P=0.669N     P=0.625    |                 (e)          (e)        P=0.585    |
|=================================================================================================================================|
|                                                                                                                                 |
|Liver                                                                                                                            |
|     Hemangiosarcoma                                                                                                             |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  0/35 (0%)    3/48 (6%)    2/48 (4%)    3/49 (6%)  |  0/34 (0%)    1/50 (2%)    1/49 (2%)    8/48 (17%) |
|ADJUSTED (b)           |   0.0%         9.7%         6.7%         8.6%      |   0.0%         3.6%         2.3%        18.9%      |
|TERMINAL (d)           |  0/25 (0%)    2/28 (7%)    1/29 (3%)    3/35 (9%)  |  0/29 (0%)    1/28 (4%)    0/38 (0%)    5/39 (13%) |
|FIRST INCIDENCE (DAYS) |   ---          655          690          727 (T)   |   ---          727 (T)      699          611       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.333      P=0.152      P=0.268      P=0.186    |  P<0.001 **   P=0.493      P=0.559      P=0.016 *  |
|INCIDENTAL TUMOR       |  P=0.287      P=0.194      P=0.256      P=0.186    |  P<0.001 **   P=0.493      P=0.581      P=0.023 *  |
|LOGISTIC REGRESSION    |  P=0.320      P=0.173      P=0.274      P=0.186    |  P<0.001 **   P=0.493      P=0.579      P=0.017 *  |
|COCHRAN-ARMITAGE       |  P=0.288                                           |  P<0.001 **                                        |
|FISHER EXACT           |               P=0.188      P=0.331      P=0.193    |               P=0.595      P=0.590      P=0.011 *  |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE   5
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|Liver                                                                                                                            |
|     Hepatocellular Adenoma                                                                                                      |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  5/35 (14%)  13/48 (27%)  17/48 (35%)  32/49 (65%) |  1/34 (3%)    3/50 (6%)    6/49 (12%)  30/48 (63%) |
|ADJUSTED (b)           |  20.0%        41.6%        53.0%        84.1%      |   3.4%        10.7%        15.8%        75.0%      |
|TERMINAL (d)           |  5/25 (20%)  10/28 (36%)  14/29 (48%)  29/35 (83%) |  1/29 (3%)    3/28 (11%)   6/38 (16%)  29/39 (74%) |
|FIRST INCIDENCE (DAYS) |   727 (T)      613          608          536       |   727 (T)      727 (T)      727 (T)      668       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P<0.001 **   P=0.057      P=0.008 **   P<0.001 ** |  P<0.001 **   P=0.291      P=0.110      P<0.001 ** |
|INCIDENTAL TUMOR       |  P<0.001 **   P=0.114      P=0.011 *    P<0.001 ** |  P<0.001 **   P=0.291      P=0.110      P<0.001 ** |
|LOGISTIC REGRESSION    |  P<0.001 **   P=0.083      P=0.007 **   P<0.001 ** |  P<0.001 **   P=0.289      P=0.110      P<0.001 ** |
|COCHRAN-ARMITAGE       |  P<0.001 **                                        |  P<0.001 **                                        |
|FISHER EXACT           |               P=0.129      P=0.027 *    P<0.001 ** |               P=0.465      P=0.135      P<0.001 ** |
|=================================================================================================================================|
|                                                                                                                                 |
|Liver                                                                                                                            |
|     Hepatocellular Carcinoma                                                                                                    |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  1/35 (3%)    7/48 (15%)   7/48 (15%)   9/49 (18%) |  0/34 (0%)    1/50 (2%)    0/49 (0%)    2/48 (4%)  |
|ADJUSTED (b)           |   4.0%        20.2%        24.1%        25.0%      |   0.0%         3.4%         0.0%         5.1%      |
|TERMINAL (d)           |  1/25 (4%)    2/28 (7%)    7/29 (24%)   8/35 (23%) |  0/29 (0%)    0/28 (0%)    0/38 (0%)    2/39 (5%)  |
|FIRST INCIDENCE (DAYS) |   727 (T)      612          727 (T)      717       |   ---          720          ---          727 (T)   |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.127      P=0.062      P=0.047 *    P=0.034 *  |  P=0.194      P=0.487        (e)        P=0.306    |
|INCIDENTAL TUMOR       |  P=0.088      P=0.186      P=0.047 *    P=0.033 *  |  P=0.172      P=0.612        (e)        P=0.306    |
|LOGISTIC REGRESSION    |  P=0.108      P=0.075      P=0.047 *    P=0.032 *  |  P=0.179      P=0.518        (e)        P=0.306    |
|COCHRAN-ARMITAGE       |  P=0.080                                           |  P=0.165                                           |
|FISHER EXACT           |               P=0.075      P=0.075      P=0.029 *  |               P=0.595        (e)        P=0.340    |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE   6
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|Liver                                                                                                                            |
|     Hepatocellular Carcinoma or Hepatocellular Adenoma                                                                          |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  6/35 (17%)  19/48 (40%)  21/48 (44%)  34/49 (69%) |  1/34 (3%)    4/50 (8%)    6/49 (12%)  31/48 (65%) |
|ADJUSTED (b)           |  24.0%        53.8%        65.5%        87.1%      |   3.4%        13.8%        15.8%        77.5%      |
|TERMINAL (d)           |  6/25 (24%)  12/28 (43%)  18/29 (62%)  30/35 (86%) |  1/29 (3%)    3/28 (11%)   6/38 (16%)  30/39 (77%) |
|FIRST INCIDENCE (DAYS) |   727 (T)      612          608          536       |   727 (T)      720          727 (T)      668       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P<0.001 **   P=0.009 **   P=0.002 **   P<0.001 ** |  P<0.001 **   P=0.168      P=0.110      P<0.001 ** |
|INCIDENTAL TUMOR       |  P<0.001 **   P=0.039 *    P=0.002 **   P<0.001 ** |  P<0.001 **   P=0.204      P=0.110      P<0.001 ** |
|LOGISTIC REGRESSION    |  P<0.001 **   P=0.015 *    P=0.001 **   P<0.001 ** |  P<0.001 **   P=0.172      P=0.110      P<0.001 ** |
|COCHRAN-ARMITAGE       |  P<0.001 **                                        |  P<0.001 **                                        |
|FISHER EXACT           |               P=0.024 *    P=0.009 **   P<0.001 ** |               P=0.322      P=0.135      P<0.001 ** |
|=================================================================================================================================|
|                                                                                                                                 |
|Liver                                                                                                                            |
|     Hepatocellular Carcinoma, Hepatocellular Adenoma, or Hepatoblastoma                                                         |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  6/35 (17%)  19/48 (40%)  21/48 (44%)  34/49 (69%) |  1/34 (3%)    4/50 (8%)    6/49 (12%)  31/48 (65%) |
|ADJUSTED (b)           |  24.0%        53.8%        65.5%        87.1%      |   3.4%        13.8%        15.8%        77.5%      |
|TERMINAL (d)           |  6/25 (24%)  12/28 (43%)  18/29 (62%)  30/35 (86%) |  1/29 (3%)    3/28 (11%)   6/38 (16%)  30/39 (77%) |
|FIRST INCIDENCE (DAYS) |   727 (T)      612          608          536       |   727 (T)      720          727 (T)      668       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P<0.001 **   P=0.009 **   P=0.002 **   P<0.001 ** |  P<0.001 **   P=0.168      P=0.110      P<0.001 ** |
|INCIDENTAL TUMOR       |  P<0.001 **   P=0.039 *    P=0.002 **   P<0.001 ** |  P<0.001 **   P=0.204      P=0.110      P<0.001 ** |
|LOGISTIC REGRESSION    |  P<0.001 **   P=0.015 *    P=0.001 **   P<0.001 ** |  P<0.001 **   P=0.172      P=0.110      P<0.001 ** |
|COCHRAN-ARMITAGE       |  P<0.001 **                                        |  P<0.001 **                                        |
|FISHER EXACT           |               P=0.024 *    P=0.009 **   P<0.001 ** |               P=0.322      P=0.135      P<0.001 ** |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE   7
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|Lung                                                                                                                             |
|     Alveolar/Bronchiolar Adenoma                                                                                                |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  5/35 (14%)   1/15 (7%)    1/19 (5%)    5/49 (10%) |  1/35 (3%)    3/15 (20%)   1/6 (17%)    2/48 (4%)  |
|ADJUSTED (b)           |  19.2%         2.6%        50.0%        14.3%      |   3.4%       100.0%         2.2%         5.0%      |
|TERMINAL (d)           |  4/25 (16%)   0/2 (0%)     1/2 (50%)    5/35 (14%) |  1/29 (3%)    1/1 (100%)   0/1 (0%)     1/39 (3%)  |
|FIRST INCIDENCE (DAYS) |   710          612          727 (T)      727 (T)   |   727 (T)      454          636          712       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.340N     P=0.547N     P=0.706      P=0.409N   |  P=0.447N     P=0.040 *    P=0.582      P=0.594    |
|INCIDENTAL TUMOR       |  P=0.291N     P=0.660N     P=0.405      P=0.413N   |  P=0.479N     P=0.098      P=0.776      P=0.594    |
|LOGISTIC REGRESSION    |  P=0.287N     P=0.688      P=0.476      P=0.404N   |  P=0.453N     P=0.127      P=0.444      P=0.593    |
|COCHRAN-ARMITAGE       |  P=0.487N                                          |  P=0.379N                                          |
|FISHER EXACT           |               P=0.409N     P=0.302N     P=0.405N   |               P=0.075      P=0.274      P=0.618    |
|=================================================================================================================================|
|                                                                                                                                 |
|Lung                                                                                                                             |
|     Alveolar/Bronchiolar Carcinoma or Alveolar/Bronchiolar Adenoma                                                              |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  5/35 (14%)   1/15 (7%)    2/19 (11%)   5/49 (10%) |  2/35 (6%)    3/15 (20%)   1/6 (17%)    3/48 (6%)  |
|ADJUSTED (b)           |  19.2%         2.6%       100.0%        14.3%      |   6.9%       100.0%         2.2%         7.5%      |
|TERMINAL (d)           |  4/25 (16%)   0/2 (0%)     2/2 (100%)   5/35 (14%) |  2/29 (7%)    1/1 (100%)   0/1 (0%)     2/39 (5%)  |
|FIRST INCIDENCE (DAYS) |   710          612          727 (T)      727 (T)   |   727 (T)      454          636          712       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.293N     P=0.547N     P=0.244      P=0.409N   |  P=0.416N     P=0.048 *    P=0.601      P=0.626    |
|INCIDENTAL TUMOR       |  P=0.249N     P=0.660N     P=0.034 *    P=0.413N   |  P=0.442N     P=0.120      P=0.782      P=0.626    |
|LOGISTIC REGRESSION    |  P=0.244N     P=0.688      P=0.054      P=0.404N   |  P=0.428N     P=0.185      P=0.506      P=0.615    |
|COCHRAN-ARMITAGE       |  P=0.446N                                          |  P=0.389N                                          |
|FISHER EXACT           |               P=0.409N     P=0.526N     P=0.405N   |               P=0.152      P=0.386      P=0.648    |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE   8
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|Mammary Gland                                                                                                                    |
|     Carcinoma                                                                                                                   |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  0/35 (0%)    0/50 (0%)    0/50 (0%)    0/49 (0%)  |  3/35 (9%)    1/50 (2%)    2/50 (4%)    4/49 (8%)  |
|ADJUSTED (b)           |   0.0%         0.0%         0.0%         0.0%      |  10.3%         2.8%         5.1%         9.3%      |
|TERMINAL (d)           |  0/25 (0%)    0/28 (0%)    0/29 (0%)    0/35 (0%)  |  3/29 (10%)   0/28 (0%)    1/38 (3%)    2/39 (5%)  |
|FIRST INCIDENCE (DAYS) |   ---          ---          ---          ---       |   727 (T)      643          710          528       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |    (e)          (e)          (e)          (e)      |  P=0.388      P=0.310N     P=0.383N     P=0.648N   |
|INCIDENTAL TUMOR       |    (e)          (e)          (e)          (e)      |  P=0.322      P=0.171N     P=0.354N     P=0.602N   |
|LOGISTIC REGRESSION    |    (e)          (e)          (e)          (e)      |  P=0.333      P=0.226N     P=0.369N     P=0.590N   |
|COCHRAN-ARMITAGE       |    (e)                                             |  P=0.340                                           |
|FISHER EXACT           |                 (e)          (e)          (e)      |               P=0.187N     P=0.334N     P=0.622N   |
|=================================================================================================================================|
|                                                                                                                                 |
|Pituitary Gland: Pars Distalis or Unspecified Site                                                                               |
|     Adenoma                                                                                                                     |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  0/29 (0%)    0/9 (0%)     0/14 (0%)    0/38 (0%)  | 10/32 (31%)   3/17 (18%)   4/9 (44%)    6/44 (14%) |
|ADJUSTED (b)           |   0.0%         0.0%         0.0%         0.0%      |  33.2%        75.0%        80.0%        16.2%      |
|TERMINAL (d)           |  0/22 (0%)    0/0          0/0          0/28 (0%)  |  8/28 (29%)   3/4 (75%)    4/5 (80%)    6/37 (16%) |
|FIRST INCIDENCE (DAYS) |   ---          ---          ---          ---       |   720          727 (T)      727 (T)      727 (T)   |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |    (e)          (e)          (e)          (e)      |  P=0.024N*    P=0.442      P=0.321      P=0.075N   |
|INCIDENTAL TUMOR       |    (e)          (e)          (e)          (e)      |  P=0.015N*    P=0.106      P=0.047 *    P=0.062N   |
|LOGISTIC REGRESSION    |    (e)          (e)          (e)          (e)      |  P=0.021N*    P=0.154      P=0.077      P=0.078N   |
|COCHRAN-ARMITAGE       |    (e)                                             |  P=0.055N                                          |
|FISHER EXACT           |                 (e)          (e)          (e)      |               P=0.250N     P=0.360      P=0.058N   |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE   9
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|Skin: Subcutaneous Tissue                                                                                                        |
|     Fibroma                                                                                                                     |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  0/35 (0%)    2/50 (4%)    1/50 (2%)    1/49 (2%)  |  0/35 (0%)    0/50 (0%)    0/50 (0%)    0/49 (0%)  |
|ADJUSTED (b)           |   0.0%         7.1%         3.4%         2.7%      |   0.0%         0.0%         0.0%         0.0%      |
|TERMINAL (d)           |  0/25 (0%)    2/28 (7%)    1/29 (3%)    0/35 (0%)  |  0/29 (0%)    0/28 (0%)    0/38 (0%)    0/39 (0%)  |
|FIRST INCIDENCE (DAYS) |   ---          727 (T)      727 (T)      711       |   ---          ---          ---          ---       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.652N     P=0.263      P=0.530      P=0.578    |    (e)          (e)          (e)          (e)      |
|INCIDENTAL TUMOR       |  P=0.644      P=0.263      P=0.530      P=0.557    |    (e)          (e)          (e)          (e)      |
|LOGISTIC REGRESSION    |  P=0.662N     P=0.263      P=0.530      P=0.572    |    (e)          (e)          (e)          (e)      |
|COCHRAN-ARMITAGE       |  P=0.644                                           |    (e)                                             |
|FISHER EXACT           |               P=0.343      P=0.588      P=0.583    |                 (e)          (e)          (e)      |
|=================================================================================================================================|
|                                                                                                                                 |
|Skin: Subcutaneous Tissue                                                                                                        |
|     Fibrosarcoma                                                                                                                |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  4/35 (11%)   6/50 (12%)   6/50 (12%)   6/49 (12%) |  0/35 (0%)    1/50 (2%)    1/50 (2%)    0/49 (0%)  |
|ADJUSTED (b)           |  14.6%        20.1%        18.0%        14.2%      |   0.0%         3.6%         2.6%         0.0%      |
|TERMINAL (d)           |  2/25 (8%)    5/28 (18%)   3/29 (10%)   1/35 (3%)  |  0/29 (0%)    1/28 (4%)    1/38 (3%)    0/39 (0%)  |
|FIRST INCIDENCE (DAYS) |   681          613          578          379       |   ---          727 (T)      727 (T)      ---       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.523N     P=0.456      P=0.469      P=0.593    |  P=0.495N     P=0.493      P=0.554        (e)      |
|INCIDENTAL TUMOR       |  P=0.569      P=0.599N     P=0.441N     P=0.589    |  P=0.495N     P=0.493      P=0.554        (e)      |
|LOGISTIC REGRESSION    |  P=0.564      P=0.554      P=0.438N     P=0.587    |  P=0.495N     P=0.493      P=0.554        (e)      |
|COCHRAN-ARMITAGE       |  P=0.543                                           |  P=0.522N                                          |
|FISHER EXACT           |               P=0.608      P=0.608      P=0.595    |               P=0.588      P=0.588        (e)      |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE  10
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|Skin: Subcutaneous Tissue                                                                                                        |
|     Neurofibrosarcoma, Fibrosarcoma, Sarcoma,                                                                                   |
|     Neurofibroma, or Fibroma                                                                                                    |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  4/35 (11%)   8/50 (16%)   7/50 (14%)   8/49 (16%) |  0/35 (0%)    2/50 (4%)    1/50 (2%)    0/49 (0%)  |
|ADJUSTED (b)           |  14.6%        27.0%        21.1%        18.6%      |   0.0%         5.5%         2.6%         0.0%      |
|TERMINAL (d)           |  2/25 (8%)    7/28 (25%)   4/29 (14%)   1/35 (3%)  |  0/29 (0%)    1/28 (4%)    1/38 (3%)    0/39 (0%)  |
|FIRST INCIDENCE (DAYS) |   681          613          578          379       |   ---          443          727 (T)      ---       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.501      P=0.248      P=0.359      P=0.396    |  P=0.357N     P=0.272      P=0.554        (e)      |
|INCIDENTAL TUMOR       |  P=0.432      P=0.423      P=0.583N     P=0.454    |  P=0.362N     P=0.402      P=0.554        (e)      |
|LOGISTIC REGRESSION    |  P=0.427      P=0.327      P=0.594N     P=0.373    |  P=0.413N     P=0.485      P=0.554        (e)      |
|COCHRAN-ARMITAGE       |  P=0.397                                           |  P=0.375N                                          |
|FISHER EXACT           |               P=0.396      P=0.498      P=0.381    |               P=0.343      P=0.588        (e)      |
|=================================================================================================================================|
|                                                                                                                                 |
|Skin: Subcutaneous Tissue                                                                                                        |
|     Neurofibrosarcoma, Fibrosarcoma, or Sarcoma                                                                                 |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  4/35 (11%)   6/50 (12%)   6/50 (12%)   7/49 (14%) |  0/35 (0%)    2/50 (4%)    1/50 (2%)    0/49 (0%)  |
|ADJUSTED (b)           |  14.6%        20.1%        18.0%        16.4%      |   0.0%         5.5%         2.6%         0.0%      |
|TERMINAL (d)           |  2/25 (8%)    5/28 (18%)   3/29 (10%)   1/35 (3%)  |  0/29 (0%)    1/28 (4%)    1/38 (3%)    0/39 (0%)  |
|FIRST INCIDENCE (DAYS) |   681          613          578          379       |   ---          443          727 (T)      ---       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.495      P=0.456      P=0.469      P=0.489    |  P=0.357N     P=0.272      P=0.554        (e)      |
|INCIDENTAL TUMOR       |  P=0.439      P=0.599N     P=0.441N     P=0.589    |  P=0.362N     P=0.402      P=0.554        (e)      |
|LOGISTIC REGRESSION    |  P=0.374      P=0.554      P=0.438N     P=0.474    |  P=0.413N     P=0.485      P=0.554        (e)      |
|COCHRAN-ARMITAGE       |  P=0.403                                           |  P=0.375N                                          |
|FISHER EXACT           |               P=0.608      P=0.608      P=0.484    |               P=0.343      P=0.588        (e)      |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE  11
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|Spleen                                                                                                                           |
|     Hemangiosarcoma                                                                                                             |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  0/34 (0%)    2/19 (11%)   1/20 (5%)    0/49 (0%)  |  0/34 (0%)    0/26 (0%)    2/17 (12%)   2/47 (4%)  |
|ADJUSTED (b)           |   0.0%        33.3%        20.0%         0.0%      |   0.0%         0.0%        12.3%         4.7%      |
|TERMINAL (d)           |  0/25 (0%)    2/6 (33%)    1/5 (20%)    0/35 (0%)  |  0/29 (0%)    0/5 (0%)     1/10 (10%)   0/39 (0%)  |
|FIRST INCIDENCE (DAYS) |   ---          727 (T)      727 (T)      ---       |   ---          ---          711          611       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.231N     P=0.021 *    P=0.186        (e)      |  P=0.233        (e)        P=0.147      P=0.297    |
|INCIDENTAL TUMOR       |  P=0.231N     P=0.021 *    P=0.186        (e)      |  P=0.128        (e)        P=0.108      P=0.500    |
|LOGISTIC REGRESSION    |  P=0.231N     P=0.021 *    P=0.186        (e)      |  P=0.281        (e)        P=0.079      P=0.351    |
|COCHRAN-ARMITAGE       |  P=0.275N                                          |  P=0.281                                           |
|FISHER EXACT           |               P=0.124      P=0.370        (e)      |                 (e)        P=0.107      P=0.334    |
|=================================================================================================================================|
|                                                                                                                                 |
|Thyroid Gland: Follicular Cell                                                                                                   |
|     Adenoma                                                                                                                     |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |                                                    |                                                    |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  0/35 (0%)    0/11 (0%)    0/14 (0%)    0/48 (0%)  |  3/34 (9%)    0/14 (0%)    0/4 (0%)     3/46 (7%)  |
|ADJUSTED (b)           |   0.0%         0.0%         0.0%         0.0%      |  10.3%         0.0%         0.0%         7.5%      |
|TERMINAL (d)           |  0/25 (0%)    0/0          0/0          0/34 (0%)  |  3/29 (10%)   0/0          0/0          2/38 (5%)  |
|FIRST INCIDENCE (DAYS) |   ---          ---          ---          ---       |   727 (T)      ---          ---          670       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |    (e)          (e)          (e)          (e)      |  P=0.531N       (e)          (e)        P=0.535N   |
|INCIDENTAL TUMOR       |    (e)          (e)          (e)          (e)      |  P=0.480N       (e)          (e)        P=0.537N   |
|LOGISTIC REGRESSION    |    (e)          (e)          (e)          (e)      |  P=0.522N       (e)          (e)        P=0.526N   |
|COCHRAN-ARMITAGE       |    (e)                                             |  P=0.603N                                          |
|FISHER EXACT           |                 (e)          (e)          (e)      |               P=0.346N     P=0.709N     P=0.509N   |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE  12
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|All Organs                                                                                                                       |
|     Hemangioma                                                                                                                  |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  1/35 (3%)    0/50 (0%)    1/50 (2%)    2/49 (4%)  |  0/35 (0%)    0/50 (0%)    0/50 (0%)    1/49 (2%)  |
|ADJUSTED (b)           |   4.0%         0.0%         3.4%         5.7%      |   0.0%         0.0%         0.0%         2.6%      |
|TERMINAL (d)           |  1/25 (4%)    0/28 (0%)    1/29 (3%)    2/35 (6%)  |  0/29 (0%)    0/28 (0%)    0/38 (0%)    1/39 (3%)  |
|FIRST INCIDENCE (DAYS) |   727 (T)      ---          727 (T)      727 (T)   |   ---          ---          ---          727 (T)   |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.344      P=0.477N     P=0.729N     P=0.617    |  P=0.264        (e)          (e)        P=0.559    |
|INCIDENTAL TUMOR       |  P=0.344      P=0.477N     P=0.729N     P=0.617    |  P=0.264        (e)          (e)        P=0.559    |
|LOGISTIC REGRESSION    |  P=0.344      P=0.477N     P=0.729N     P=0.617    |  P=0.264        (e)          (e)        P=0.559    |
|COCHRAN-ARMITAGE       |  P=0.300                                           |  P=0.241                                           |
|FISHER EXACT           |               P=0.412N     P=0.657N     P=0.625    |                 (e)          (e)        P=0.583    |
|=================================================================================================================================|
|                                                                                                                                 |
|All Organs                                                                                                                       |
|     Hemangiosarcoma                                                                                                             |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  0/35 (0%)    4/50 (8%)    2/50 (4%)    3/49 (6%)  |  0/35 (0%)    1/50 (2%)    3/50 (6%)    8/49 (16%) |
|ADJUSTED (b)           |   0.0%        13.2%         6.7%         8.6%      |   0.0%         3.6%         7.3%        18.9%      |
|TERMINAL (d)           |  0/25 (0%)    3/28 (11%)   1/29 (3%)    3/35 (9%)  |  0/29 (0%)    1/28 (4%)    1/38 (3%)    5/39 (13%) |
|FIRST INCIDENCE (DAYS) |   ---          655          690          727 (T)   |   ---          727 (T)      699          611       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.425      P=0.084      P=0.268      P=0.186    |  P=0.002 **   P=0.493      P=0.173      P=0.016 *  |
|INCIDENTAL TUMOR       |  P=0.380      P=0.107      P=0.256      P=0.186    |  P<0.001 **   P=0.493      P=0.209      P=0.017 *  |
|LOGISTIC REGRESSION    |  P=0.411      P=0.101      P=0.277      P=0.186    |  P<0.001 **   P=0.493      P=0.190      P=0.016 *  |
|COCHRAN-ARMITAGE       |  P=0.365                                           |  P<0.001 **                                        |
|FISHER EXACT           |               P=0.114      P=0.343      P=0.193    |               P=0.588      P=0.198      P=0.010 *  |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE  13
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|All Organs                                                                                                                       |
|     Hemangiosarcoma or Hemangioma                                                                                               |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  1/35 (3%)    4/50 (8%)    3/50 (6%)    5/49 (10%) |  0/35 (0%)    1/50 (2%)    3/50 (6%)    9/49 (18%) |
|ADJUSTED (b)           |   4.0%        13.2%        10.0%        14.3%      |   0.0%         3.6%         7.3%        21.3%      |
|TERMINAL (d)           |  1/25 (4%)    3/28 (11%)   2/29 (7%)    5/35 (14%) |  0/29 (0%)    1/28 (4%)    1/38 (3%)    6/39 (15%) |
|FIRST INCIDENCE (DAYS) |   727 (T)      655          690          727 (T)   |   ---          727 (T)      699          611       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.264      P=0.224      P=0.356      P=0.193    |  P<0.001 **   P=0.493      P=0.173      P=0.010 ** |
|INCIDENTAL TUMOR       |  P=0.230      P=0.268      P=0.346      P=0.193    |  P<0.001 **   P=0.493      P=0.209      P=0.010 *  |
|LOGISTIC REGRESSION    |  P=0.250      P=0.264      P=0.361      P=0.193    |  P<0.001 **   P=0.493      P=0.190      P=0.010 ** |
|COCHRAN-ARMITAGE       |  P=0.200                                           |  P<0.001 **                                        |
|FISHER EXACT           |               P=0.310      P=0.453      P=0.199    |               P=0.588      P=0.198      P=0.006 ** |
|=================================================================================================================================|
|                                                                                                                                 |
|All Organs                                                                                                                       |
|     Malignant Lymphoma And Histiocytic Sarcoma                                                                                  |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  6/35 (17%)   4/50 (8%)    4/50 (8%)    5/49 (10%) | 15/35 (43%)  18/50 (36%)  13/50 (26%)  16/49 (33%) |
|ADJUSTED (b)           |  23.1%        12.9%        12.4%        13.5%      |  48.2%        46.7%        32.0%        38.8%      |
|TERMINAL (d)           |  5/25 (20%)   2/28 (7%)    2/29 (7%)    4/35 (11%) | 13/29 (45%)   9/28 (32%)  11/38 (29%)  14/39 (36%) |
|FIRST INCIDENCE (DAYS) |   710          690          541          608       |   685          454          514          653       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.345N     P=0.296N     P=0.278N     P=0.271N   |  P=0.200N     P=0.358      P=0.137N     P=0.292N   |
|INCIDENTAL TUMOR       |  P=0.422N     P=0.166N     P=0.355N     P=0.183N   |  P=0.253N     P=0.412N     P=0.121N     P=0.288N   |
|LOGISTIC REGRESSION    |  P=0.372N     P=0.226N     P=0.248N     P=0.257N   |  P=0.290N     P=0.381N     P=0.088N     P=0.307N   |
|COCHRAN-ARMITAGE       |  P=0.422N                                          |  P=0.300N                                          |
|FISHER EXACT           |               P=0.172N     P=0.172N     P=0.272N   |               P=0.339N     P=0.082N     P=0.234N   |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE  14
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|All Organs                                                                                                                       |
|     Malignant Lymphoma: Histiocytic, Lymphocytic, Mixed,                                                                        |
|     NOS, or Undifferentiated Cell Type                                                                                          |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            |  6/35 (17%)   4/50 (8%)    4/50 (8%)    5/49 (10%) | 15/35 (43%)  18/50 (36%)  13/50 (26%)  16/49 (33%) |
|ADJUSTED (b)           |  23.1%        12.9%        12.4%        13.5%      |  48.2%        46.7%        32.0%        38.8%      |
|TERMINAL (d)           |  5/25 (20%)   2/28 (7%)    2/29 (7%)    4/35 (11%) | 13/29 (45%)   9/28 (32%)  11/38 (29%)  14/39 (36%) |
|FIRST INCIDENCE (DAYS) |   710          690          541          608       |   685          454          514          653       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.345N     P=0.296N     P=0.278N     P=0.271N   |  P=0.200N     P=0.358      P=0.137N     P=0.292N   |
|INCIDENTAL TUMOR       |  P=0.422N     P=0.166N     P=0.355N     P=0.183N   |  P=0.253N     P=0.412N     P=0.121N     P=0.288N   |
|LOGISTIC REGRESSION    |  P=0.372N     P=0.226N     P=0.248N     P=0.257N   |  P=0.290N     P=0.381N     P=0.088N     P=0.307N   |
|COCHRAN-ARMITAGE       |  P=0.422N                                          |  P=0.300N                                          |
|FISHER EXACT           |               P=0.172N     P=0.172N     P=0.272N   |               P=0.339N     P=0.082N     P=0.234N   |
|=================================================================================================================================|
|                                                                                                                                 |
|All Organs                                                                                                                       |
|     Benign Tumors                                                                                                               |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            | 11/35 (31%)  21/50 (42%)  28/50 (56%)  45/49 (92%) | 13/35 (37%)  12/50 (24%)  13/50 (26%)  44/49 (90%) |
|ADJUSTED (b)           |  42.3%        65.2%        84.8%       100.0%      |  41.9%        38.6%        32.1%        97.8%      |
|TERMINAL (d)           | 10/25 (40%)  17/28 (61%)  24/29 (83%)  35/35 (100%)| 11/29 (38%)  10/28 (36%)  11/38 (29%)  38/39 (97%) |
|FIRST INCIDENCE (DAYS) |   710          612          598          458       |   720          454          636          555       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P<0.001 **   P=0.052      P<0.001 **   P<0.001 ** |  P<0.001 **   P=0.517N     P=0.283N     P<0.001 ** |
|INCIDENTAL TUMOR       |  P<0.001 **   P=0.147      P=0.001 **   P<0.001 ** |  P<0.001 **   P=0.338N     P=0.211N     P<0.001 ** |
|LOGISTIC REGRESSION    |  P<0.001 **   P=0.097      P<0.001 **   P<0.001 ** |  P<0.001 **   P=0.284N     P=0.234N     P<0.001 ** |
|COCHRAN-ARMITAGE       |  P<0.001 **                                        |  P<0.001 **                                        |
|FISHER EXACT           |               P=0.223      P=0.021 *    P<0.001 ** |               P=0.143N     P=0.195N     P<0.001 ** |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE  15
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
|=================================================================================================================================|
|                       |                                                    |                                                    |
|                       |                       MALES                        |                      FEMALES                       |
|                       |                                                    |                                                    |
|DOSE                   |   0 PPM        100 PPM      200 PPM      600 PPM   |   0 PPM        100 PPM      200 PPM      600 PPM   |
|                       |                                                    |                                                    |
|=================================================================================================================================|
|                                                                                                                                 |
|All Organs                                                                                                                       |
|     Malignant Tumors                                                                                                            |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            | 10/35 (29%)  22/50 (44%)  16/50 (32%)  22/49 (45%) | 18/35 (51%)  24/50 (48%)  18/50 (36%)  31/49 (63%) |
|ADJUSTED (b)           |  35.7%        57.9%        46.5%        52.0%      |  57.9%        58.7%        41.6%        67.4%      |
|TERMINAL (d)           |  7/25 (28%)  12/28 (43%)  11/29 (38%)  15/35 (43%) | 16/29 (55%)  12/28 (43%)  13/38 (34%)  24/39 (62%) |
|FIRST INCIDENCE (DAYS) |   681          612          541          379       |   685          443          514          528       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.330      P=0.041 *    P=0.250      P=0.126    |  P=0.179      P=0.186      P=0.214N     P=0.161    |
|INCIDENTAL TUMOR       |  P=0.178      P=0.203      P=0.387      P=0.159    |  P=0.066      P=0.536N     P=0.156N     P=0.155    |
|LOGISTIC REGRESSION    |  P=0.199      P=0.064      P=0.278      P=0.105    |  P=0.059      P=0.507N     P=0.128N     P=0.151    |
|COCHRAN-ARMITAGE       |  P=0.156                                           |  P=0.056                                           |
|FISHER EXACT           |               P=0.111      P=0.463      P=0.098    |               P=0.464N     P=0.116N     P=0.195    |
|=================================================================================================================================|
|                                                                                                                                 |
|All Organs                                                                                                                       |
|     Malignant and Benign Tumors                                                                                                 |
|                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------|
|TUMOR RATES            |    #            #            #            #        |    #            #            #            #        |
|-----------            |                                                    |                                                    |
|OVERALL (a)            | 20/35 (57%)  32/50 (64%)  33/50 (66%)  46/49 (94%) | 24/35 (69%)  29/50 (58%)  25/50 (50%)  46/49 (94%) |
|ADJUSTED (b)           |  71.4%        84.2%        89.2%       100.0%      |  75.0%        69.8%        55.3%        97.9%      |
|TERMINAL (d)           | 17/25 (68%)  22/28 (79%)  25/29 (86%)  35/35 (100%)| 21/29 (72%)  16/28 (57%)  18/38 (47%)  38/39 (97%) |
|FIRST INCIDENCE (DAYS) |   681          612          541          379       |   685          443          514          528       |
|-----------------------|                                                    |                                                    |
|STATISTICAL TESTS (f)  |                                                    |                                                    |
|-----------------------|                                                    |                                                    |
|LIFE TABLE             |  P=0.005 **   P=0.058      P=0.038 *    P=0.001 ** |  P=0.009 **   P=0.238      P=0.184N     P=0.006 ** |
|INCIDENTAL TUMOR       |  P<0.001 **   P=0.290      P=0.049 *    P<0.001 ** |  P<0.001 **   P=0.359N     P=0.090N     P<0.001 ** |
|LOGISTIC REGRESSION    |  P<0.001 **   P=0.141      P=0.021 *    P<0.001 ** |  P<0.001 **   P=0.323N     P=0.078N     P<0.001 ** |
|COCHRAN-ARMITAGE       |  P<0.001 **                                        |  P<0.001 **                                        |
|FISHER EXACT           |               P=0.339      P=0.273      P<0.001 ** |               P=0.223N     P=0.069N     P=0.003 ** |
|=================================================================================================================================|
         DATE: 09/09/94                     EXPERIMENT: 05074 TEST: 01                                                 PAGE  16
                       STATISTICAL ANALYSIS OF PRIMARY TUMORS IN MICE(B6C3F1) -- DOWICIDE EC-7 PENTACHLOROPHENOL
                                                 TERMINAL SACRIFICE AT 104 WEEKS
 (a)  Number of tumor-bearing animals / number of animals examined at site.
 (b)  Kaplan-Meier estimated lifetime tumor incidence after adjustment for 
      intercurrent mortality.
 (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.  The incidental tumor 
      test regards these lesions as non-fatal.  Logistic regression is an alternative
      method for analyzing the incidence of non-fatal tumors.  The Cochran-Armitage
      and Fisher's 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. 
 (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).
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