Table 3. Multivariable analysis of risk factor associated with retinal vascularization of ROP eyes with IVR at initial treatment.

Variable	Peripheral avascular eyes	Completed vascularization eyes	P	OR (95%CI)
BW (g)	1163.66±347.31	1274.38±348.17	0.001	0.997 (0.996, 0.999)
GA (wk)	200.88±13.1	204.97±20.62	0.627	0.994 (0.969,1.019)
Severity of ROP
Zone I (n)	4	6	0.005	0.388 (0.2, 0.775)
APROP (n)	11	9
Zone II (n)	45	111
Repeated injections (n)	0.5	0.33	0.045	1.754 (1.013, 3.038)
RBC (×109/L)	3.58±0.67	3.47±0.64	0.111	0.263 (0.051, 1.357)
PLT (×109/L)	305.9±111.34	323.5±110.3	0.525	0.999 (0.996, 1.002)
HGB (g/L)	107.7±18.66	103.95±19.77	0.057	1.056 (0.998, 1.118)

BW: Birth weight; GA: Gestational age; APROP: Aggressive posterior retinopathy of prematurity; RBC: Red blood cell; PLT: Platelet; HGB: Hemoglobin. OR: Odds ratio; CI: Confidence interval; SD: Standard deviation.

mean±SD