Cost and Outcome of BehaviouRal Activation (COBRA): a randomised controlled trial of behavioural activation versus cognitive behavioural therapy for depression
Depression is a common, debilitating and costly disorder. The best-evidenced psychological therapy – cognitive–behavioural therapy (CBT) – is complex and costly. A simpler therapy, behavioural activation (BA), may be an effective alternative. To determine the clinical effectiveness and cost-effectiveness of BA compared with CBT for depressed adults at 12 and 18 months ' follow-up, and to investigate the processes of treatments.