Overcoming treatment resistance in chronic depression: a pilot study on outcome and feasibility of the cognitive behavioral analysis system of psychotherapy as an inpatient treatment program.

BACKGROUND The Cognitive Behavioral Analysis System of Psychotherapy (CBASP), initially developed as an outpatient treatment for chronic depression (CD), has been adapted as a multidisciplinary 12-week inpatient program for CD. METHODS Seventy inpatients with CD and treatment resistance were included in a noncontrolled trial. The Hamilton Depression Rating Scale served as the primary outcome measure. Prospective naturalistic follow-up assessments were conducted 6 and 12 months after discharge. RESULTS Dropout rate was 7.1%; 90.4% perceived the program as helpful. Pre-post comparisons yielded strong effect sizes; 75.7% of the intention-to-treat sample responded, and 40.0% remitted. Nonremission was associated with experiencing temporary deterioration of symptoms during treatment. After 6 months 75.0% and after 12 months 48.0% of patients sustained response. CONCLUSIONS The CBASP program appears as a feasible acute treatment for treatment-resistant CD inpatients with promising outcome. However, the continuation of treatment after discharge should be optimized especially for patients with subjective deterioration during treatment.