Table 1.

Neonatal characteristics of infants with and without RoP.

Variables	Infants without ROP n = 56 (36.4%)	Infants with ROP n = 98 (63.6%)	P-value (t-test)
Birth weight (g)	1400.67 ± 275.52	1354.50 ± 298.48	0.324
Gestational age (week)	30.25 ± 2.12	29.27 ± 2.08	0.005
First minute Apgar score	7.78 ± 1.33	6.88 ± 1.93	0.001
Fifth minute Apgar score	9.03 ± 1.073	8.39 ± 1.466	0.001
Long ippv (day)	1.65 ± 4.14	3.13 ± 8.08	0.139
Duration O2 therapy (day)	3.7015 ± 4.81	7.5111 ± 13.37	0.014
PAB(HK)	19.79 ± 12.28	38.45 ± 46.79	0.000