The Effect of Prenatal Care on Preterm Birth in a Low-Income Minority Population in DC [ID: 1378551

Abstract

INTRODUCTION: Structural and social barriers to health care affect prenatal care (PNC) utilization among underrepresented minorities in the District of Columbia (DC) and contribute to preterm birth (PTB) disparities. The PTB rate among Black people in DC was 13.1% (2018–2020), higher than the overall DC (9.8%, 2020) and United States (10.1%, 2020) rates. We evaluated the association between prenatal care utilization and preterm birth in a low-income minority population in DC. METHODS: As part of a collaborative effort with DC Health to reduce PTB, we designed a REDCap database to collect pregnancy and delivery data on all inpatient and outpatient patients at Howard University Hospital (HUH), between January 2020 and September 2022. Our primary exposure variable was PNC (yes or no). Our outcome was PTB (gestational age < or ≥37 weeks). Crude and adjusted logistic regression models analyzed the relationship between prenatal care and preterm birth. RESULTS: A total of 1,382 patient charts were evaluated, of which 11.6% had PTB and 95.1% had any PNC. Majority were Black (55.6%) or Hispanic (42.8%), and had Medicaid (92.2%). Any PNC was associated with a 54% reduced odds of PTB (adjusted odds ratio 0.46, 95% CI 0.22–0.97). Additionally, history of preeclampsia (3.75, 2.51–5.62) or spontaneous PTB (2.51, 1.50–4.18) were significantly associated with PTB. CONCLUSION: Prenatal care usage was associated with reduced odds of preterm birth in our population. Identifying and addressing barriers to prenatal care utilization may improve preterm birth rates among risk-entrenched patients at HUH.