Effectiveness of brief group transdiagnostic therapy for emotional disorders in primary care: A randomized controlled trial identifying predictors of outcome.

Brief transdiagnostic psychotherapy is a possible approach for emotional disorders in primary care. The objective of the present randomized controlled trial was to determine its effectiveness compared with the treatment as usual based on pharmacological interventions in patients with mild/moderate symptoms. In addition, emotional regulation strategies and cognitive factors were studied as potential predictors. Participants ( = 105) were assigned to brief group therapy based on the Unified Protocol ( = 53) or treatment as usual ( = 52). They were assessed before and after the interventions. Mean differences and stepwise regression analyses were performed. Brief group transdiagnostic psychotherapy was more effective than medication in reducing all clinical symptoms ( = .007 for generalized anxiety;  = .000 for somatization;  = .000 for panic disorder; and  = .041 for depression) and in modifying emotional regulation strategies and cognitive processes ( = .000 for cognitive reappraisal, expressive suppression, worry, rumination, and metacognition) with moderate/high effect sizes. Besides, it was found that these variables acted as predictors of the therapeutic change. It is concluded that brief therapies could be an accurate treatment for mild/moderate emotional disorders in primary care due to their cost-effective characteristics.