Neurodevelopmental outcomes at age 3 years after moderate preterm, late preterm and early term birth: the Japan Environment and Children's Study

Abstract

Objective To assess the association between gestational age classification at birth and the risk of neurodevelopmental impairments at age 3 years. Design Cohort study using the Japan Environment and Children's Study database. Patients A total of 86 138 singleton children born without physical abnormalities at 32-41 weeks of gestation enrolled between January 2011 and March 2014. Main outcome measures Neurodevelopmental impairment, evaluated using the Ages and Stages Questionnaire (third edition). Methods Logistic regression analysis was used to evaluate the risk of neurodevelopmental impairment in moderate preterm, late preterm and early term children compared with term children after adjusting for socioeconomic and perinatal factors. Results The respective adjusted ORs (95% CIs) of incidence of scores below the cut-off value (