Abstract

To determine whether survival is different in "early" (23(0/7)-23(3/7) weeks) vs "late" (23(4/7)-23(6/7) weeks) infants. Records of 126 consecutive liveborn infants delivered at 23(0/7) to 23(6/7) weeks' gestation from 2001-2010 were examined using the Vermont Oxford Network database. Infants born at 23 0/7 to 23 3/7 weeks were grouped into "early" and those at 23 4/7 to 23 6/7 weeks were "late." Clinical characteristics were compared between groups and multivariate analyses were used to predict survival. Seventy-two infants were early and 54 were late. Survival was 25% vs 56%, respectively (P < .001). The early group was less likely to receive steroids (43% vs 65%; P = .016) and had a lower mean birthweight (547 g vs 596 g; P < .001). No difference in other factors was seen between groups. No change in survival was observed during the study period in either group. Late 23-week infants have improved survival compared with early infants. Delaying delivery as little as 24-96 hours may improve survival for 23-week infants.

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