Optimal timing for elective caesarean delivery in a Chinese population: a large hospital-based retrospective cohort study in Shanghai

Timing of term elective cesarean section and adverse neonatal outcomes: A multi-center retrospective cohort study

Background

Rate of cesarean section (CS), including elective CS has globally increased. Studies have found that term elective CS before 39 weeks of gestation is associated with increased risk of adverse respiratory outcomes.

Objective

To determine the rate of elective CS and examine the association between timing of elective term CS and adverse neonatal outcomes in a large population of Lebanese women.

Methods

A Multi-Center Study was conducted using data from the National Collaborative Perinatal Neonatal Network database. Simple and multivariable logistic regression models were used to examine the association between timing of term elective CS and adverse neonatal outcomes. Some of the neonatal adverse outcomes we examined included respiratory distress syndrome, admission to the NICU, and a composite of respiratory outcomes.

Results

A total of 28,997 low risk mothers who delivered through primary and repeat elective CS were included in the study. Uncomplicated elective planned term CS constituted 25% of all CS deliveries in Lebanon. Primary and repeat CS at 37 weeks of gestation increased the odds of most of the studied adverse neonatal outcomes. There were few associations between CS and adverse neonatal outcomes at 38 weeks of gestation.

Conclusions

Term primary and repeat cesarean delivery prior to 39 weeks of gestation is associated with respiratory and other adverse neonatal outcomes. Delaying birth 1–2 weeks till 39 weeks of gestation can prevent 64–77% of adverse respiratory outcomes.