Inhaled NO at moderate showed no clear difference in use of ECMO before hospital discharge compared with severe criteria (moderate certainty).
Inhaled NO at moderate probably leads to lower progression to severe criteria compared with severe criteria (moderate certainty).
Inhaled NO at moderate showed no clear difference in neurodevelopmental disability at 18 to 24 months among survivors compared with severe criteria (moderate certainty).
Inhaled NO at moderate showed no clear difference in death or requirement for ECMO compared with severe criteria (low certainty).
Inhaled NO at moderate showed no clear difference in death before hospital discharge compared with severe criteria (moderate certainty).
Inhaled steroids showed no clear difference in moderate/severe disability at 7 years compared with systemic steroids (moderate certainty).
Inhaled steroids showed no clear difference in death or moderate/severe disability at 7 years compared with systemic steroids (moderate certainty).