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Late preterm infants (gestational age range, 34 weeks to 36 weeks and 6 days) are known to be at greater risk for adverse outcomes than are term infants. In a retrospective study at a single perinatal unit, investigators compared outcomes among late preterm infants, preterm infants (gestational age range, 32 weeks to 33 weeks and 6 days), and term infants (gestational age, >37 weeks) whose mothers had spontaneous preterm labor at 22 weeks to 33 weeks and 6 days. Infants with congenital anomalies were excluded. Risk was evaluated using two composite outcomes: COMP-1 measured acute neonatal morbidity, and COMP-2 measured longer-term morbidity.
Of 264 infants, 23% were preterm, 26% were late preterm, and 51% were full term. Overall, 46% of infa…