Dataset, Plos One, Trends in Mortality of Extremely Preterm Infants, Samsung Medical Center.xlsx

We retrospectively reviewed the medical records of 382 preterm infants who were born at 23 and 26 weeks’ gestation and admitted to the neonatal intensive care unit (NICU) at Samsung Medical Center; 124 of the infants were born between January 1, 2001 and December 31, 2005 (period I), while 258 were born between January 1, 2006 and December 31, 2011 (period II). Cause of death, defined as the disorder directly and immediately causing death of the infant, was determined by the direct and immediate cause of death ascertained from the death certificate, and these causes of death were adjudicated with the information obtained from the medical records. We analyzed clinical findings, namely gestational age (GA), birth weight, sex, mode of delivery, antenatal steroid use, chorioamnionitis, small for GA (SGA), oligohydramnios, PROM, pregnancy-induced hypertension, Apgar score at 1 and 5 minutes.