County-Level Maternal Vulnerability and Preterm Birth in the US

(Abstracted from JAMA Network Open 2023;6(5):e2315306) In the United States, approximately 1 in 10 births are considered preterm, or born at <37 weeks of gestation. Historically, studies on preterm birth (PTB) have focused on maternal characteristics. However, an appreciation for the impact of community factors, such as poverty, air pollution, and other measures of neighborhood quality, on PTB is growing.