TABLE 2:

Incidence of retinopathy of prematurity, stage 3 or higher, in surviving infants by birth weight

First author (reference)	1000 g or less	Birth weight grouping 100 to 11500 g	More than 1500 g
Saigal et al 1984 (12)	15/117 (13%)
Ng et al 1988 (10)	14/70 (20%)	7/261 (3%)	0/174 (0%)
Darlow 1988 (11)	11/84 (13%)	1/229 (<1%)
Fledelius 1990 (9)	2/20 (10%)	9/104 (9%)	3/287 (1%)
Holmström et al 1993 (6)	25/74 (34%)	27/186 (14%)
Barnekow and Stigmar 1993 (8)	5/23 (22%)	1/100 (1%)	0/69 (0%)
Haugen and Markestad 1997 (13)	6/66 (9%)	1/141 (<1%)
Total	76/454	46/1021	3/530
Range	9% to 34%	<1% to 14%	0% to 1%