[Various statistical patterns in the course of malignant schizophrenia].

A statistical study of process schizophrenia (101 cases with the completed process selected from 1198 observations in six psychiatric institutions) has made it possible to establish that the process has the constant rate of progression throughout the active course of the disease up to the development of the residual state without productive disorders. The quantitative expression of the rate of progression is reflected in the fact that the proportion of patients in whom the given clinical stage of the disease course comes to the end constitutes some 30% annually.