Maternal Nativity, Race, and Ethnicity and Infant Mortality in the US

This population-based cohort study found that US-born individuals had significantly higher odds of infant mortality compared with non-US-born individuals, particularly among full-term births and among those self-identifying as Black, Hispanic, White, or more than 1 race. Sudden unexpected infant death was a major contributor to these disparities. Investigation into the underlying factors contributing to these disparities is needed.