Admissions and Emergency Visits by Late Preterm Singletons and Twins in the First 5 Years: A Population-Based Cohort Study

OBJECTIVE: To compare admission and emergency visits of late preterm (34^0/7-36^6/7 weeks) versus term infants (37^0/7-41^6/7 weeks) in the first 5 years. STUDY DESIGN: This population-based cohort study included all singletons and twins born alive at 34^0/7 to 41^6/7 weeks' gestation registered in a health administrative database in Ontario, Canada, between April 1, 2002 and December 31, 2012. Admissions and emergency visits from initial postnatal …