Table 2.

Multivariate logistic regression analyses of risk factors for developing any stage of ROP in gestational age <33 weeks infants.

Variable	P value	Beta coefficient	Adjusted odds ratio	95% CI
Gestational age (weeks)	0.002*	−0.415	0.660	0.508–0.858
Birth weight (g)	<0.001*	−0.004	0.996	0.994–0.998
Maternal age (years)	0.032*	−0.104	0.901	0.819–0.991

CI: confidence interval; ROP: retinopathy of prematurity.

*P < 0.05.