A method for testing differences in morbidity risk for affective psychoses

Abstract

A modified method for testing differences between 2 proportions is described, and its use for testing differences in the morbidity risk for affective psychoses is discussed. The method is based upon the u test for comparison of 2 proportions. An application of the method in the study of sex differences in morbidity risk for affective psychoses in parents of probands with unipolar depression and manic-depressive psychosis is presented.