The relationship between social support in pregnancy and postnatal depression.

PURPOSE: Lack of social support is considered a potential risk factor for postnatal depression but limited longitudinal evidence is available. Pregnancy, when women have increased contact with healthcare services, may be an opportune time to intervene and help strengthen women's social networks to prevent feelings of depression postnatally, particularly for those at greatest risk. Our study examined the longitudinal relationship between social support in pregnancy and postnatal depression, and whether this is moderated by age or relationship status. METHODS: We analysed data collected from 525 women from a diverse inner-city maternity population in England who were interviewed in pregnancy and again three months postnatally. Women provided sociodemographic information and completed self-report measures of depression (Edinburgh Postnatal Depression Scale) and social support (Social Provisions Scale). RESULTS: Less social support in pregnancy was associated with postnatal depression, after adjusting for sociodemographic confounders and antenatal depression (Coef. = - 0.05; 95% CI - 0.10 to - 0.01; p = 0.02). There was weak evidence of a moderating effect of relationship status. Subgroup analysis showed a stronger relationship between social support in pregnancy and postnatal depression for women who were not living with a partner (Coef. = - 0.11; 95% CI - 0.21 to - 0.01; p = 0.03) than for those who were (Coef. = - 0.03; 95% CI - 0.09 to 0.02; p = 0.28). Sensitivity analysis using multiple imputations to account for missing data confirmed the main results. CONCLUSIONS: Interventions that target social support in pregnancy have the potential to reduce depression postnatally. Future research should explore in greater detail which women would benefit most from which type of social support.