Abstract
Prevalence of organic factors, developmental mental disorders, and mental disorder rates among relatives were compared in two groups of patients aged 7-14 and 15-19 years. Pathology of pregnancy and delivery, as well as organic factors in infancy were found significantly more often in the younger age group, while organicity in the school age was more frequent in the adolescent group. Developmental mental disorders (including eating disorders, sphincter dysfunction, psychomotor hyperactivity, fragmentary deficits, and behavior disorders) were significantly more frequent in the 7-14 age group. Familial incidence of mental disorders was significantly more often noted in adolescents, while alcohol abuse and dependence tended to run in families of the younger children.