Background: Maternal mental illness is a significant public health problem during the perinatal period and beyond. Little is known about how social determinants of health (SDOH) affect maternal mental health. Materials and Methods: We used cross-sectional data from the 2016 to 2017 National Survey of Children's Health with 19,127 mothers of a nationally representative sample of U.S. children aged 0-5. We estimated the prevalence of poor reported mental health (reported as "fair"/"poor") among mothers with children aged 0-5 by SDOH. Multivariable logistic regression was used to examine factors associated with poor maternal mental health. Results: Approximately 4.5% of mothers with children aged 0-5 reported having poor mental health in 2016-2017. Postadjustment and mothers' poor mental health were significantly associated with age (adjusted odds ratio [AOR]: 18-20 years: 2.77, 95% confidence interval [CI]: 1.35-5.67; 21-24 years AOR: 2.14, 95% CI: 1.22-3.73, and 30-34 years AOR: 1.97, 95% CI: 1.13-3.43), U.S.-born status (AOR: 2.31, 95% CI: 1.48-3.63), poor physical health (AOR: 8.69, 95% CI: 5.81-13.02), having a child with a special health care need (AOR: 1.65, 95% CI: 1.03-2.64), experiencing food insecurity (afford enough food, yet, unhealthy [AOR: 2.74, 95% CI: 1.59-4.70] and sometimes/often not afford enough food [AOR: 3.20, 95% CI: 1.76-5.84]), and low social capital (AOR: 1.97, 95% CI: 1.04-3.73). Conclusion: Mothers with children aged 0-5 who had poor physical health and experienced food insecurity were at the greatest risk for poor mental health. Integrated perinatal and behavioral health models, screening, and referrals may help identify and treat mothers experiencing these issues.
Keywords: maternal health; mental health; social determinants of health.