Fig. 1

Scatter plot illustrating the effect of the G-ROP criteria on screening indication. Each study subject is represented by its gestational age (GA) and birth weight (BW) in this graph. The currently used thresholds for ROP screening inclusion are indicated by the red lines. The thresholds for GA and BW in the G-ROP criteria are shown by the black lines. All infants in the area hatched in red would not have qualified for ROP screening using the G-ROP criteria. As per local guidelines, all preterm infants (GA < 37 weeks) with oxygen supplementation also enter ROP screening regardless of BW. These infants (n = 6) are represented in the upper right corner of the graph in the light blue hatched area. None of these children developed ROP. The clinical outcome related to ROP is represented by the shape of the individual data point. Infants represented by black triangles developed type 1 ROP, those represented by squares type 2 ROP, and those represented by dark circles low-grade ROP. Infants shown by the light circles did not have clinical evidence for any ROP in serial fundus examinations