[Role of age in the dynamics of the syndromologic structure of borderline mental disorders in children (according to data from epidemiologic studies)].

Borderline psychic diseases were studied (on the basis of the results of epidemiological examinations) in 11,000 urban children aged 0 to 14 years. The studies have revealed a relationship between the clinical manifestations of a disease and the age factor. Prevalent psychopathological syndromes, as well as symptoms characteristic for this or that age period were disclosed. A mathematical correlation analysis of the inter-connections between the environmental factors and individual reactivity on the one hand, and the neurotic and neurosis-like disorders on the other showed that the above factors were of no equal importance for children of different age groups. The data obtained are necessary for solving problems concerning the differential diagnosis, prognosis, therapy, and prophylaxis of psychic diseases in children.