Association between Year of Birth and 1-Year Survival among Extremely Preterm Infants in Sweden during 2004-2007 and 2014-2016
Importance: Since 2004-2007, national guidelines and recommendations have been developed for the management of extremely preterm births in Sweden. If and how more uniform management has affected infant survival is unknown. Objective: To compare survival of extremely preterm infants born during 2004-2007 with survival of infants born during 2014-2016. Design, Setting and Participants: All births at
