Influence of time of birth in early neonatal mortality and morbidity: retrospective cohort study.

Background: A key target of the 2030 Sustainable Development Goals is to eliminate preventable deaths in newborns and children under 5. This study aimed to estimate the effect of time of birth on early neonatal mortality (ENM) and low Apgar scores at 5 min (LA5) in newborns.

Methods: A retrospective cohort study was conducted using vital statistics data on live births, maternal morbidity, congenital defects and perinatal mortality in Cauca-Colombia (2017-2021) excluding out-of-hospital, multiple and major defect cases.