Incidence of Postpartum Depression and Its Association With Antenatal Psychiatric Symptoms: A Longitudinal Study in 25 Villages of Rural South Karnataka.

Background: Postpartum depression (PPD) is the commonest mental health disorder post-childbirth, yet there is a paucity of data in rural areas regarding the actual incidence of PPD, which excludes pre-existing or antenatal depression. To estimate the incidence of PPD among rural women of south Karnataka and identify predictors of PPD, including antenatal psychiatric disorders. Methods: A longitudinal study in 25 villages in south Karnataka among 150 pregnant women in the third trimester of pregnancy using simple random sampling. Baseline data collected and revised Clinical Interview Schedule used to screen antenatal psychiatric disorders. Participants followed-up 6-8 weeks postpartum, end-line data collected, and Edinburg Postnatal Depression Scale administered. Chi-square and Fischer's exact tests for association between PPD and covariates. Logistic regression to calculate adjusted odds ratios. Results: Prevalence of antenatal psychiatric disorders was 15.3%. The incidence of PPD was 11%. A significantly higher proportion of PPD was found among women with adverse events in the last year, low socioeconomic status, and perceived lack of care/support at home. Predictors of PPD were antenatal psychiatric disorders (AOR = 4.3, 95% CI = 1.22-5.11; P = 0.028), mothers reporting worry about their infant's health (AOR = 7.7, 95% CI = 1.22-48.32; P = 0.012) and mothers receiving postpartum care by caregivers other than their own mother (AOR = 4.0, 95% CI = 1.13-8.09; P = 0.030). Conclusions: Our study found that one in ten rural women is developing PPD and there is a strong link between PPD and antenatal psychiatric disorders and family factors. This calls for capacity building of general physicians and village-level workers and strengthening of the Home-Based Newborn Care Program, where weekly postpartum home visits by ASHA are an opportunity for screening and counselling mothers.