Comparison 1. Restricted versus liberal oxygen therapy (all preterm/LBW infants) in early neonatal period.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Death (any)	2	298	Risk Ratio (M‐H, Fixed, 95% CI)	1.23 [0.80, 1.90]
2 Cicatricial RLF (any grade) in survivors	2	221	Risk Ratio (M‐H, Fixed, 95% CI)	0.26 [0.11, 0.58]
3 Vascular RLF (any stage) in survivors	3	341	Risk Ratio (M‐H, Fixed, 95% CI)	0.34 [0.25, 0.46]
4 Vascular RLF (severe stages) in survivors	1	157	Risk Ratio (M‐H, Fixed, 95% CI)	0.38 [0.17, 0.85]
5 Cicatricial RLF (severe grades) in survivors	2	277	Risk Ratio (M‐H, Fixed, 95% CI)	0.19 [0.07, 0.50]
6 Death or vascular (RLF (any stage)	2	298	Risk Ratio (M‐H, Fixed, 95% CI)	0.59 [0.48, 0.72]
7 Death or cicatricial RLF (any grade)	2	298	Risk Ratio (M‐H, Fixed, 95% CI)	0.77 [0.56, 1.07]
8 Cicatricial RLF (severe grades) in survivors (excluding Patz 1954)	1	157	Risk Ratio (M‐H, Fixed, 95% CI)	0.32 [0.11, 0.93]
9 Vascular RLF (any stage) in survivors (excluding Patz 1954)	2	221	Risk Ratio (M‐H, Fixed, 95% CI)	0.36 [0.26, 0.51]