Does clinically relevant psychopathology in adolescents necessarily require treatment or does it “grow out”?

OBJECTIVE: To determine the treatment effect of psychodynamic therapy for adolescents in comparison to normative developmental progression in two groups without treatment: healthy adolescents and adolescents with juvenile diabetes. RESEARCH DESIGN AND METHODS: In a 3-wave longitudinal study, n = 531 adolescents (n = 303 treated adolescents, n = 119 healthy, n = 109 with diabetes) and their parents filled out psychopathology questionnaires (Youth Self-Report [YSR] and Child Behaviour Checklist [CBCL]). Growth curve modeling (GCM) was used to examine within-person change in psychopathology while controlling for stable between-person differences. RESULTS: GCM analyses revealed significant with…