Trends, Prevalence, and Risk Factors of Food Insecurity Among Pregnant and Postpartum Women in the United States: Findings from the 2019-2021 National Health Interview Survey.

Despite the widespread food insecurity in the United States, there is limited research investigating its prevalence among pregnant women and the potential impact it has on maternal and child health outcomes. This study examined trends in the prevalence of, and investigated risk factors for, food insecurity among peripartum women, using a nationally representative sample in the United States. This cross-sectional study included pregnant and postpartum women aged 18-49 years who reported being currently pregnant or pregnant in the past 12 months and who participated in the National Health Interview Survey from 2019 to 2021. Weighted multivariable logistic regression analysis was used to estimate associations with food insecurity. A total of 1,527 pregnant women, weighted to represent 5,588,192 women in the United States, were included in the analysis. Overall, from 2019 to 2021, 10.8% of peripartum women were food insecure. The prevalence of food insecurity changed substantially between 2019 and 2021 (2019: 10.6% confidence interval [95% CI: 8.7-13.5], 2020: 16.0% [95% CI: 10.9-22.8], 2021: 6.2% [95% CI: 4.2-9.1]). The adjusted odds of food insecurity were significantly higher among pregnant and postpartum women in 2020 (aOR 2.15), who had a health insurance coverage (aOR 2.98) and who had an unmet health care need in the preceding 12 months (aOR 6.52). We found that food insecurity was common among peripartum women between 2019 and 2021 and was exacerbated by the COVID-19 pandemic. Identifying the factors that predispose peripartum women to the risk of food insecurity can guide the development and implementation of targeted interventions aimed at reducing the adverse impact of food insecurity on perinatal and infant health.