Depressive symptoms in adolescence and quality of life 17 years later - follow-up study.

Objectives: The answer to the question to what extent depressive symptoms which occur in the middle and late adolescence period affect the quality of life in adulthood.

Methods: The sample group consisted of 308 adults out of 3,445 who had participated in a 2000 study of prevalence of depressive symptoms among students. 17 years later, letters were sent to all study participants with information about the purpose of the study and an original questionnaire, with quality of life and quality of social network scales (the Collaborative Research on Ageing in Europe Social Network Index - COURAGE-SNI and WHOQOL-AGE) attached.