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Discovering the causes of cancer and the means of prevention

Sample size calculations for case-control studies

This R package can be used to calculate the required samples size for unconditional multivariate analyses of  unmatched case-control studies.  The sample sizes are for a scalar exposure effect, such as binary, ordinal or continuous exposures.  The sample sizes can also be computed for scalar interaction effects.  The analyses account for the effects of potential confounder variables that are also included in the multivariate logistic model.