Trends in morbidities of late preterm infants in the neonatal intensive care unit.

Objective: To characterize demographics and trends in length of stay (LOS), morbidities, and mortality in late preterm infants.

Study Design: Cohort study of infants born between 34 and 36 weeks gestation between 1999 and 2018 without major congenital anomalies at Pediatrix Medical Group neonatal intensive care units (NICUs).

Results: 307,967 infants from 410 NICUs met inclusion criteria.