Table 2. Multivariable-adjusted odds ratios of developing ROP (all grades) for various factors.

Parameter	Odds ratio (95% CI)	P value
Preeclampsia (yes vs. no)	1.00 (0.84–1.20)	0.9884
Gestational age (per week)	0.81 (0.77–0.85)	< .0001
Birth weight, per 100 grams	0.92 (0.88–0.97)	0.0005
Cesarean section (yes vs. no)	0.84 (0.74–0.95)	0.0064
Sex of baby (male vs. female)	1.09 (0.96–1.23)	0.1725
SGA (yes vs. no)	1.25 (1.01–1.55)	0.0407
Apgar score at 5 min (≥7 vs. <7)	0.75 (0.65–0.86)	< .0001
RDS (yes vs. no)	0.93 (0.81–1.07)	0.3222
Transfusion (yes vs. no)	1.26 (1.11–1.44)	0.0005
PDA (required treatment vs. no)	1.44 (1.26–1.64)	< .0001
Sepsis (yes vs. no)	0.84 (0.73–0.96)	0.0123

Abbreviations: SGA, small for gestational age; RDS, respiratory distress syndrome with surfactant treatment; PDA, patent ductus arteriosus.