Obstetric outcomes and influencing factors of premature birth in Chinese-American women in 2022: a cohort study based on the National Vital Statistics System

This study investigates obstetric outcomes and factors influencing preterm birth among Chinese-American and American Indian or Alaskan Native women to address the gap in knowledge and inform targeted interventions. A retrospective cohort study was conducted using 2022 data from the National Vital Statistics System (NVSS), covering 50 U.S. states and the District of Columbia. The study included 40,983 Chinese-American and 35,648 AIAN women aged ≥18 years. Based on gestational age(GA), preterm birth was defined as extremely preterm birth (GA