To compare the 5-year survival without major disability in infants born at the threshold of viability at 22–25 weeks who were actively treated in the delivery room and admitted to a NICU to that of those born at 26–27 weeks of gestation. All infants between 22+0 and 27+6 weeks of gestation admitted to a regional intensive care unit during 1999–2003 were enroled prospectively.
The survival and major disability at 5 years of age were analysed by gestational age.