Looking beyond depression: A meta-analysis of the effect of behavioral activation on depression, anxiety, and activation
Background: Depression is a prevalent and impairing condition. Behavioral Activation (BA) is a parsimonious, cost-effective, and easily disseminated psychological intervention for depression. The present meta-analysis expanded on existing literature supporting the efficacy of BA for depression by examining the effects of BA on additional relevant outcomes for patients with depression, namely the reduction in anxiety symptoms and increase in activation. Methods: Randomized controlled trials of BA for depression compared to active and inactive control were identified via systematic review. Effect sizes using Hedges’s g were calculated for each outcome compared to both active and inactive control using random effects models. Subgroup analyses were used to examine the inclusion of a discussion of values as a moderator of depression symptom outcome in BA. Results: Twenty-eight studies were included. Meta-analyses of symptom change between groups from baseline-to-post intervention indicated that BA outperformed inactive control for depression (g = 0.83), anxiety (g = 0.37), and activation (g = 0.64). Effect sizes did not differ significantly from active control for depression (g = 0.15), anxiety (g = 0.03), activation (g = 0.04), or for subgroup analyses. Study quality was generally low, and evidence of publication bias was present. Conclusions: Results support the efficacy of BA relative to inactive control for reducing symptoms of depression and anxiety in addition to increasing activation. BA did not differ from active control on these outcomes. These findings support the use of BA for the treatment of depression, yet call for continued high quality evaluations of BA for depression.