[Genetico-epidemiologic analysis of schizophrenia with a paroxysmal-progressive course].

The results of studying the causes of prevalence and clinical polymorphism of schizophrenia on the basis of epidemiological selection of probands with paroxysmal-progredient form (211 families) have been presented in this paper. The analysis of multifactorial threshold and monolocus diallele models of factors of schizophrenia prevalence among relatives and in a population allowed to ground the hypothesis of the main gene. The characteristic manifestation is paroxysmal course of the process with small progredience and great specific weight of affective disorders. The increase of heterozygous genotype penetrance is linked to constitutional (somatotype, peculiarities of premorbid personality) and environmental (alcohol excesses, psychogenia) factors of probands.