doi:10.1007/s10608-020-10170-9engNavarro Haro, Maria V.Guillén Botella, VerónicaBadenes Ribera, LauraBorao, LuisGarcía Palacios, AzucenaDialectical behavior therapy in the treatment of comorbid borderline personality disorder and eating disorder in a naturalistic setting: A six-year follow-up studyART-2021-125104Background: Dialectical Behavior Therapy (DBT) has shown evidence of its effectiveness in the treatment of borderline personality disorder (BPD) and eating disorders (EDs) separately, and there is preliminary evidence for co-occurrent BPD and EDs. However, the long-term effectiveness of DBT for this specific population is still unknown. The main goal of this study was to assess long-term treatment effectiveness in people diagnosed with BPD and ED. Methods: Participants (N = 109) had previously received a 6-month treatment during a clinical trial (DBT = 64 vs. Treatment as Usual, Cognitive Behavior Therapy; TAU CBT = 45). Outcome measures (emotional eating, depressive symptoms, anger, emotion regulation, impulsiveness, and resilience) were evaluated prospectively at 4- and 6-year follow-ups.Results: There was a statistically significant improvement in most study outcomes from pre-treatment to the follow-ups in the DBT condition, and in depression, resilience and trait anger in the TAU CBT. No statistically significant between-group differences were found. Nonetheless, a high percentage of participants showed a clinically significant improvement over time in the DBT condition. Conclusions: Findings of this study contribute to determinate the long-term treatment effectiveness of DBT for people with BPD and ED in routine psychotherapeutic practice. Longitudinal studies with larger sample sizes are needed to confirm these results.2021http://zaguan.unizar.es/record/14910010.1007/s10608-020-10170-9http://zaguan.unizar.es/record/149100oai:zaguan.unizar.es:149100info:eu-repo/grantAgreement/ES/MINECO/PSI2010-21423-PSICCOGNITIVE THERAPY AND RESEARCH 45, 3 (2021), 480–493All rights reservedhttp://www.europeana.eu/rights/rr-f/info:eu-repo/semantics/openAccess