Original ArticleIntensive Short-Term Dynamic Psychotherapy for DSM-IV Personality Disorders: A Randomized Controlled TrialAbbass, Allan MD, FRCPC*; Sheldon, Albert MD†; Gyra, John PhD‡; Kalpin, Allen MD§Author Information *Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada; †Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, Seattle, Washington; ‡Private Practice, West Vancouver, British Columbia, Canada; and §Ontario Centre for STDP, Toronto, Ontario, Canada. Supported with grants from the Lions Gate Research Foundation, Dalhousie Medical Research Foundation, Queen Elizabeth II Health Sciences Centre Research Foundation, and the Dalhousie University Department of Psychiatry. Send reprint requests to Allan Abbass, MD, FRCPC, 5909 Veterans Memorial Lane, Room 8203, Abbie J. Lane Building, QEII Health Sciences Center, Halifax, Nova Scotia, B3H 2E2, Canada. E-mail: [email protected]. The Journal of Nervous and Mental Disease: March 2008 - Volume 196 - Issue 3 - p 211-216 doi: 10.1097/NMD.0b013e3181662ff0 Buy Metrics Abstract This study evaluated the efficacy and long-term effectiveness of intensive short-term dynamic psychotherapy (ISTDP) in the treatment of patients with DSM-IV personality disorders (PD). Twenty-seven patients with PD were randomized to treatment with ISTDP or a minimal-contact, delayed-treatment control condition. ISTDP-treated patients improved significantly more than controls on all primary outcome indices, reaching the normal ranges on both the brief symptom inventory (1.51–0.51, p < 0.001) and inventory of interpersonal problems (1.56–0.67, p < 0.001). When control patients were treated, they experienced benefits similar to the initial treatment group. In long-term follow-up, the whole group maintained their gains and had an 83.3% reduction of personality disorder diagnoses. Treatment costs were thrice offset by reductions in medication and disability payments. This preliminary study of ISTDP suggests it is efficacious and cost-effective in the treatment of PD. Limitations of this study and suggestions for future research are discussed. © 2008 Lippincott Williams & Wilkins, Inc.