Eleven factors were obtained by factor analysing the CPRS results from a longitudinal treatment process study in chronic schizophrenics during maintenance phase. Such factors may give more reliable information than the single item. Two factors ‐ “anxiety‐depression‐asthenia” and “psychotic” (psychotic schizophrenic symptoms and signs) ‐ nonpsychotic rating of anxiety and depressive symptoms as well as definite psychotic‐schizophrenic symptoms, respectively ‐ demonstrated special value for the clinical work, i.e. being relevant instrument for monitoring