A meta‐analysis by Saugstad et al showed that preterm babies ≤32 weeks' gestation resuscitated with lower (0.21‐0.3) vs higher (0.6‐1.0) initial FiO 2 showed no differences in morbidity but exhibited an almost significant trend toward reduced mortality. 24 A systematic review with meta‐analysis published in 2019 by Welsford et al concluded that preterm newborns' ideal initial FiO 2 is still unknown.
1
—
—