[Genetic-correlation analysis of schizophrenic syndromes]

Two hundred and seven families of patients with schizophrenia were examined. Diagnosis of the disease in probands and relatives was made according to the syndromal forms of schizophrenia. The simple, catatonic, hebephrenic and paranoid forms of the disease were distinguished. Current genetic-correlation analysis demonstrated marked genetic correlation between the disease forms. This makes the above-mentioned classification of schizophrenia inadequate for special genetic studies aimed at the definition of factors that determine the development of different clinical forms of the disease.