The present era of major cutbacks in intensive treatment programs throughout Europe stresses the importance of evaluating the outcomes of such programs for adolescents with severe personality pathology and comorbidity. Personality pathology has proven to be a valid concept in adolescents, with relatively high prevalence, that needs to be targeted by evidence-based interventions. The present study focused on the evaluation of outcomes of a 12-month mentalization-based treatment for adolescents (MBT-A) program in 118 inpatient adolescents with personality pathology symptoms, using a multi-informant multidomain design. The results showed that during treatment, adolescents improved on general psychiatric symptoms, personality pathology dimensions, and health-related and generic quality of life. Improvement was not only statistically significant, but also clinically important, especially for internalizing domains. Implications for clinical practice and research are discussed
