[The frequency of occurrence of negative symptoms at the early stage of schizophrenic psychosis].

103 patients were admitted for the first time to the psychiatric hospital (Institute of Psychiatry and Neurology in Warsaw) between 1976-1983 and received a research diagnosis of schizophrenia (in accordance with the ICD-9 criteria). The course and clinical pattern of the illness were analyzed at a follow-up in 65 patients--rehospitalized in the 5th year from their first admission. As regards the clinical pattern analysis, it was focused mostly on positive and negative symptoms occurrence, as assessed using the Andreasen Scales (SANS, SAPS). The data obtained from the case reports were statistically tested and the results were presented in the tables according to the research questions. The frequency of occurrence of at least one negative symptom was found to be high in the group under study (in 72% of patients during the first hospitalization and in 83% at the five-years' follow-up). The increment in the frequency of occurrence pertained also to all groups of negative symptoms, which is concordant with many authors, results.