Outcomes of Preterm Infants Born at 22 to 23 Weeks’ Gestation in 11 International Neonatal Networks

Substantial international variations were identified in outcomes for infants born at 22 to 23 weeks' gestation who were admitted to 11 neonatal networks in the 12 countries or regions. The variations can be due to differences in systems, care practices, attitudes, and culture; however, identification of variation can help focus efforts toward research aimed at understanding the causal determinants of variation.