Table 1. Comparison of clinical and treatment characteristics between patients with AROP and type 1 ROP .

Parameter	AROP (n=56) (range)	Type 1 ROP (n=20) (range)	p value
Mean gestational age (GA) at birth, weeks	30.71±3.57 (20-34)	32.4±1.71 (30-37)	0.081
Mean birth weight, grams	1535.7±433 (700-2500)	1440±356.5 (1000-2000)	0.27
Mean GA at first injection, weeks	35.71±2.84 (29-39)	38±2.2 (36-41)	0.014*
Mean GA at rescue therapy, weeks	39.14±2.69 (32-41)	43.67±2.88 (40-46)	0.0004*
Mean interval between initial and rescue therapy, weeks	3.43±0.84 (2-4)	4.67±1.03 (4-6)	0.0016*
Percentage of eyes requiring laser	100%	60%	0.0033*

*p<0.05, ROP: Retinopathy of prematurity, AROP: Aggressive retinopathy of prematurity