Predictors, moderators and mediators of psychological therapies for perinatal depression in low- and middle-income countries: a systematic review

Abstract

Abstract Psychological interventions have demonstrated effectiveness in treating perinatal depression (PND), but understanding for whom, how and under what conditions they improve symptoms in low- and middle-income countries (LMICs) is largely unknown. This review aims to synthesise current knowledge about predictors, moderators and mediators of psychological therapies to treat PND in LMICs. Five databases were searched for studies quantitatively examining the effects of at least one mediator, moderator or predictor of therapies for PND in LMICs. The review sampled seven publications evaluating findings from randomised trials conducted in Asia and sub-Saharan Africa. The small number of included studies limited generalisability of findings. Analyses of trials with acceptable quality suggest that patient activation in Pakistan and social support in both India and Pakistan may mediate psychotherapy effectiveness, higher baseline depression severity may moderate treatment response in South Africa, and shorter depression duration at baseline may moderate intervention response in India. This review highlights current gaps in evidence quality and the need for future trials exploring PND psychotherapy effectiveness in LMICs to follow reporting guidelines to facilitate appropriate predictor, moderator and mediator analyses.