Design, Setting, and Participants
MAY, SECONDARY
This study is a predefined secondary analyses of a multicenter randomized clinical trial that was performed at tertiary academic neonatal intensive care units (NICUs) in China. Participants included neonates enrolled in the NASONE trial between December 2017 and May 2021 and belonging to 3 predefined subgroups: (1) born at less than or equal to 28 weeks’ (plus 6 days) gestation, (2) invasively ventilated for more than 1 week from birth, and (3) with CO