[Various patterns in the duration of paroxysms and remissions among patients with schizophrenia and manic-depressive psychosis with monopolar depressions].

Characteristics of the course of endogenous psychoses (schizophrenia and manic-depressive psychoses) with a pattern of depressive attacks were studied on randomized material, using a clinical-statistical method. The duration of paroxysms and remissions was shown to decrease with the progression of disease; differences between nosological groups with regard to lowered duration of remissions were detected. New statistical regularities in the distribution of duration of paroxysms and remissions were elicited which corroborated the data obtained and also allowed the researchers to determine the probability of the cessation of paroxysms and remissions of any ordinal number and to evaluate the representativeness of the group of patients under study.