Determinants and outcomes of preterm births in Nigerian tertiary facilities

Objective

To describe the incidence, and sociodemographic and clinical factors associated with preterm birth and perinatal mortality in Nigeria.

Design

Secondary analysis of data collected through the Maternal Perinatal Database for Quality, Equity and Dignity (MPD-4-QED) Programme.

Setting

Data from births in 54 referral-level hospitals across Nigeria between 1 September 2019 and 31 August 2020.

Population

A total of 69 698 births.

Methods

Multilevel modelling was used to determine the factors associated with preterm birth and perinatal mortality.

Outcome measures

Preterm birth and preterm perinatal mortality.

Results

Of 62 383 live births, 9547 were preterm (153 per 1000 live births). Maternal age (<20 years – adjusted odds ratio [aOR] 1.52, 95% CI 1.36–1.71; >35 years – aOR 1.23, 95% CI 1.16–1.30), no formal education (aOR 1.68, 95% CI 1.54–1.84), partner not gainfully employed (aOR 1.94, 95% CI 1.61–2.34) and no antenatal care (aOR 2.62, 95% CI 2.42–2.84) were associated with preterm births. Early neonatal mortality for preterm neonates was 47.2 per 1000 preterm live births (451/9547). Father's occupation (manual labour aOR 1.52, 95% CI 1.20–1.93), hypertensive disorders of pregnancy (aOR 1.37, 95% CI 1.02–1.83), no antenatal care (aOR 2.74, 95% CI 2.04–3.67), earlier gestation (28 to <32 weeks – aOR 2.94, 95% CI 2.15–4.10; 32 to <34 weeks – aOR 1.80, 95% CI 1.3–2.44) and birthweight <1000 g (aOR 21.35, 95% CI 12.54–36.33) were associated with preterm perinatal mortality.

Conclusions

Preterm birth and perinatal mortality in Nigeria are high. Efforts should be made to enhance access to quality health care during pregnancy, delivery and the neonatal period, and improve the parental socio-economic status.