[Reduction of Non-Suicidal Self-Injury (NSSI) in Adolescents with Borderline Personality Organization Treated with TFP-A].

This study examines whether transference-focused psychotherapy for adolescents (TFP-A) in a dayclinic setting increases the capability to regulate affects and decreases self-destructive behavior in adolescents with borderline personality organization in comparison to treatment as usual (TAU). A total of 120 adolescents consecutively presenting to the dayclinic were allocated to either TFP-A or TAU. They were assessed for aggression, irritability, depression, self-harm, internalizing behavior and pathological personality traits at baseline and after twelve weeks. TFP-A was more effective than TAU in reducing self-harm. Aggression and irritability was improved within the treatment group. These results can be explained by an improvement in affect regulation through a treatment with TFP-A in a dayclinic setting. Further research is necessary in order to assess whether TFP-A reduces self-harm, aggressive behavior and irritability from a long-term perspective and whether these exploratory results can be replicated in independent samples.