Racial Disparities in Cardiovascular Complications With Pregnancy-Induced Hypertension in the United States

Abstract

Women with pregnancy-induced hypertension, defined as gestational hypertension and preeclampsia/eclampsia, are at increased risk of long-term cardiovascular disease, but less is known about the spectrum of acute cardiovascular outcomes, especially across racial/ethnic groups. We evaluated the risk of cardiovascular events at delivery associated with gestational hypertension and preeclampsia/eclampsia, compared with no pregnancy-induced hypertension, overall and by race/ethnicity. We used the 2016 to 2018 National Inpatient Sample data. International Classification of Diseases , Tenth Revision , Clinical Modification codes identified delivery hospitalizations and clinical diagnoses. Using survey weights, cardiovascular events were examined using logistic regression by pregnancy-induced hypertension status, with subsequent stratification by race/ethnicity. Among 11 304 996 deliveries in 2016 to 2018, gestational hypertension occurred in 614 995 (5.4%) and preeclampsia in 593 516 (5.2%). Black women had higher odds for preeclampsia independent of underlying comorbidities (adjusted odds ratio, 1.45 [95% CI, 1.42–1.49]) and had the highest rates for several complications (peripartum cardiomyopathy, 506; heart failure, 660; acute renal failure, 953; and arrhythmias, 418 per 100 000 deliveries). After adjustment for socioeconomic factors and comorbidities, preeclampsia/eclampsia was associated with increased risk of cardiovascular events in women of all races/ethnicities. However, risk was highest among Asian/Pacific Islander women and lowest among Black women. In sum, while Black women were the most likely to experience preeclampsia, Asian/Pacific women were the most at risk for acute cardiovascular complications during delivery hospitalization.