Originalbeiträge (Originals). Wirksamkeit und Grenzen einer DBT-basierten tagesklinischen Behandlung für Patient:innen mit Borderline-Persönlichkeitsstörung

Abstract

This retrospective longitudinal study investigates changes in symptom burden during an average of 11 weeks of DBT-informed treatment at discharge, and three months after discharge. The symptomatology of n = 178 patients with borderline personality disorder treated from 2009 to 2017 was investigated with established borderline-specific (BSL) and -unspecific questionnaires (BSI-18, BDI) at admission, discharge, and 3-months follow-up by calculating mixed models, effect sizes, and response rates. 80 % of the patients completed the treatment regularly. In borderline-specific impairments, there were moderate and highly significant improvements with good effects and a response rate of 48 %. Approximately 20 % showed a symptom level equivalent to that of the general population. The strongest effect sizes of approximately .8 were obtained for general psychopathology, with a response rate of 66 %. Results remained stable at follow-up. Similar effects to inpatient treatment with good acceptance and efficacy could be achieved. Effect sizes differed for borderline-specific and unspecific symptoms, suggesting that DBT has different effects on different symptom areas. When comparing responders and non-responders, outpatient psychotherapy appeared to have a positive impact on the therapeutic effect. Furthermore, the results suggest that changes in borderline personality disorder extend over a longer period of time, which may indicate the limitations of curative treatment.