Abstract summary 

Depression and anxiety in pregnancy have negative consequences for women and their offspring. High adversity places pregnant women at increased mental health risk, yet there is a dearth of longitudinal research in these settings. Little is known about the pathways by which these problems emerge or persist in pregnancy.Women were enrolled in a prospective pregnancy cohort in Soweto, South Africa (2014-2016) and assessed using validated measures (Edinburgh Postnatal Depression Scale EPDS ≥13; State Trait Anxiety Index STAI ≥12) in early (T1) and later pregnancy (T2). Data was available for n = 649 women. Multinominal regression modelling was used to determine factors associated with transient versus persistent depression and anxiety across pregnancy. Cross-lagged panel modelling explored direction of effect between depression and anxiety, and stressors.We found high rates of depression (T1: 27%; T2: 25%) and anxiety (T1: 15%; T2: 17%). Perceiving a partner made one's life harder increased risk of persistent depression (RR 5.92 95% CI [3.0-11.8] p<0.001); family stress increased risk for persistent anxiety (RR 1.71 95% CI [1.1-2.7] p = 0.027). We find evidence of a direct effect of early depression (T1) on later family stress (T2); and early family stress (T1) on later anxiety (T2).We used screening measures of depression and anxiety rather than clinical interviews.Studies which focus only on late pregnancy may underestimate risk. Early identification, in the first trimester, is critical for prevention and treatment. Partner and family stressors are a key intervention target.

Authors & Co-authors:  Redinger Stephanie S Pearson Rebecca M RM Houle Brian B Norris Shane A SA Rochat Tamsen Jean TJ

Study Outcome 

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