A randomized controlled trial on the effectiveness of a rumination-focused group treatment for residual depression.

The maintenance of residual symptoms following acute treatment is common and is associated with poor long-term prognosis. This study investigates whether a cognitive-behavioral group treatment is effective in reducing residual depression by targeting depressive rumination. Participants (N=60) were randomly assigned to either the group treatment or a wait-list control condition. Treatment significantly improved depressed mood, rumination, perceived control over rumination and dysfunctional metacognitive beliefs compared with the wait condition. Treatment gains were maintained over the follow-up period of 1 year. Attrition was low and treatment satisfaction was high. Eight individuals suffered from a depressive relapse/recurrence in the year following treatment. The results indicate that cognitive-behavioral group therapy for depressive rumination is effective and well accepted by patients suffering from residual depression.