RESUMO
OBJECTIVE: This study evaluated the effectiveness of the Dialectical Behavior Therapy Skills Training Group (DBT-ST) component of DBT. METHOD: Participants (N = 114) attended an 18-20-week DBT-ST. The study utilized a quasi-experimental design with a within-persons control group for a measure of borderline personality disorder (BPD) symptoms (at referral), and emergency department (ED) presentations, and psychiatric bed-days (both assessed for 6 months pre- and post-intervention). Primary outcomes were the number of BPD symptoms, psychological distress, depression, rate of ED presentations, and psychiatric inpatient bed-days. RESULTS: After completing DBT-ST, participants had reduced BPD symptoms, psychological distress, and depression (p < 0.001). The waitlist control group showed no improvement in BPD symptoms (p = 0.085). The rate of ED presentations was reduced (p = 0.001). There was no reduction in psychiatric inpatient bed-days (p = 0.160), likely due to insufficient power. CONCLUSIONS: DBT-ST participation in addition to treatment-as-usual is an effective treatment for people with BPD.