Effectiveness of the Thinking Healthy Programme for perinatal depression delivered through peers: Pooled analysis of two randomized controlled trials in India and Pakistan

BACKGROUND: The Thinking Healthy Programme (THP) is recommended to treat perinatal depression in resource-limited settings, but scale-up is hampered by a paucity of community health workers. THP was adapted for peer-delivery (THPP) and evaluated in two randomized controlled trials in India and Pakistan. Our aim was to estimate the effectiveness of THPP on maternal outcomes across these two settings, and evaluate effect-modification by country and other pre-defined covariates. METHODS: Participants were pregnant women aged≥18 years with depression (Patient Health Questionnaire (PHQ-9) score≥10), randomized to THPP plus enhanced usual care (EUC) or EUC-only. Primary outcomes were symptom severity and remission (PHQ-9 score