Effectiveness of psychological interventions in preventing recurrence of depressive disorder: Meta-analysis and meta-regression

BACKGROUND: Major depression is probably best seen as a chronically recurrent disorder, with patients experiencing another depressive episode after remission. Therefore, attention to reduce the risk of relapse or recurrence after remission is warranted. The aim of this review is to meta-analytically examine the effectiveness of psychological interventions to reduce relapse or recurrence rates of depressive disorder. METHODS: We systematically reviewed the pertinent trial literature until May 2014. The random-effects model was used to compute the pooled relative risk of relapse or recurrence (RR). A distinction was made between two comparator conditions: (1) treatment-as-usual and (2) the use of antidepressants. Other sources of heterogeneity in the data were explored using meta-regression. RESULTS: Twenty-five randomised trials met inclusion criteria. Preventive psychological interventions were significantly better than treatment-as-usual in reducing the risk of relapse or recurrence (RR=0.64, 95% CI=0.53-0.76, z=4.89, p