Incidence, Determinants, and Outcomes of Spontaneous Preterm Birth at Tertiary Hospitals in Enugu, Southeast, Nigeria: A Cross-Sectional Study.

BACKGROUND

In the past five years, observational evidence suggests that the rates and determinants of preterm birth may have changed due to the effect of the coronavirus disease 2019 (COVID-19) pandemic and other humanitarian crises in our environment.

AIM: This study aimed to determine the incidence, associated factors, and outcomes of preterm birth in tertiary hospitals in Enugu, southeastern Nigeria.

METHODS

This cross-sectional study included 238 pregnant women from the University of Nigeria Teaching Hospital (UNTH), Enugu State University of Science and Technology Teaching Hospital (ESUT-TH) Parklane, and Mother of Christ Specialist Hospital (MOCSH), Enugu, from April 2022 to March 2023. Eligible and consenting participants were recruited from 28-36 weeks +6 days of gestational age and followed up until delivery. Relevant outcome variables, such as sociodemographic characteristics, gestational age at delivery, and pregnancy outcomes, were recorded in a pro forma. These data were analyzed using IBM Statistical Package for the Social Sciences (SPSS) statistics for Windows, version 22.0, Armonk, NY: IBM Corp.

RESULTS

The incidence of preterm birth was 16.6% (37/223), with spontaneous preterm birth constituting 24 of 37 (64.5%) cases. The mean age of participants was 30.3 ± 4.8 years. Advanced maternal age (>35 years) (P = 0.01, adjusted odds ratio (AOR) =0.01, confidence interval (CI): 0.00-0.144), low socioeconomic status (P = 0.04, AOR = 0.40, CI: 0.11-1.46), and history of miscarriage (P = 0.02, AOR = 0.06, CI: 0.01-0.59) were the factors associated with spontaneous preterm birth. Neonatal death occurred in 21.6% (8/37) of cases within the first 24 hours. Rates of cesarean section and low birth weight were 73% (27/37) each.

CONCLUSIONS

The incidence of preterm birth is high in Enugu, and associated factors were advanced maternal age, low socioeconomic status, and a history of miscarriage.