[Depression in children: prospective studies]

Prospective longitudinal observation of children socially and emotionally immature and depressive at entering school was carried on till their early adolescence. The study's aim was to describe: 1. childhood depression dynamics, 2. developmental changes in depression, 3. factors related to the depression course, 4. relation of childhood depression to adolescence depression. A screening study of representative population of school entering children led to identification of a risk group followed-up 3 and 6 years later. The Kraków Depression Inventory (AO "B1" and IO "B1") was used to diagnose, and for analysis of depression. Results of the study revealed a tendency to chronic course of depression in the studied group. Data collected at the first and the second stage showed coincidence of the depression chronicity and a set of nonspecific factors of "biological vulnerability" on the one hand, and dysfunctional family on the other. The latter was characterized by unclear family boundaries and difficult relational individuation. Data collected at the third stage of the study showed persistence of depression in the same individuals. Entering adolescence seemed to have no impact on depression prevalence in the studied group. It was, however, evident that cognitive and general activity disturbances increased among those studied who were not diagnosed depressive in the second and third stage. This finding requires further studies.