LAUSR

Key Points Question Among women residing exclusively in low-income neighborhoods, does severe maternal morbidity or mortality differ between immigrant vs nonimmigrant women? Findings This population-based cohort study comprised 414 337 births in Ontario, Canada, among 312 175 women, all with universal health care insurance, residing in low-income neighborhoods. Immigrants had a slightly lower rate than nonimmigrants of potentially life-threatening complications (severe maternal morbidity) or mortality during birth or the postpartum period (16.6 vs 17.1 per 1000 births). Meaning This study suggests that, within low-income neighborhoods, immigrant women may have a slightly lower risk than their nonimmigrant counterparts of severe maternal morbidity or mortality.