Background
Pregnant and postpartum women may be at increased risk of violent death including homicide and suicide relative to non-pregnant women, but US national data have not been reported since implementation of enhanced mortality surveillance.
Objective
To estimate homicide and suicide ratios among women who are pregnant or postpartum and to compare their risk of violent death to non-pregnant/non-postpartum women.
Study Design
Death certificates (n=465,097) from US states with enhanced pregnancy mortality surveillance from 2005–2010 were used to compare mortality among four groups of women age 10–54: pregnant, early postpartum (pregnant within 42 days of death), late postpartum (pregnant within 43 days to 1 year of death) and non-pregnant/non-postpartum. We estimated pregnancy-associated mortality ratios and compared to non-pregnant/non-postpartum mortality ratios in order to identify differences in risk after adjusting for potential levels of pregnancy misclassification as reported in the literature.
Results
Pregnancy-associated homicide victims were most frequently young, Black, and undereducated while pregnancy-associated suicide occurred most frequently among older White women. After adjustments, pregnancy-associated homicide risk ranged from 2.2–6.2 per 100,000 live births, depending on the degree of misclassification estimated, compared to 2.5–2.6 per 100,000 non-pregnant/non-postpartum women aged 10–54. Pregnancy-associated suicide risk ranged from 1.6–4.5 per 100,000 live births after adjustments compared to 5.3–5.5 per 100,000 women aged 10–54 among non-pregnant/non-postpartum women. Assuming the most conservative published estimate of misclassification, risk of homicide among pregnant/postpartum women was 1.84 times that of non-pregnant/non-postpartum women (95% confidence interval: 1.71, 1.98) while risk of suicide was decreased (relative risk=0.62, 95% confidence interval: 0.57, 0.68).
Conclusion
Pregnancy and postpartum appear to be times of increased risk for homicide and decreased risk for suicide among women in the US.