AN ALTERNATIVE APPROACH TO THE ANALYSIS OF ANIMAL CARCINOGENICITY STUDIES

Long-term animal carcinogenicity studies are an important part of the risk analysis process assessing the carcinogenic potential of products to humans. Results from the statistical analysis of the data from suc h studies are generally presented as a series of hypothesis tests indi cating whether there was a significant rise in the number of tumors at given sites. The conclusion from such an analysis depends on the size of the experiment. In particular, the number of false-negative result s can be high when tumors are rare. In this paper, a test for equivale nce fixing the proportion of false negatives is proposed. The effect o n the required sample size is also discussed. (C) 1996 Academic Press, Inc.