| Birth weight (g) | Screened infants (n) | Any ROP (n, %) | Severe ROP (n, %) |
| ≤1000 | 1109 | 761 (68) | 288 (26) |
| 1001–1250 | 1085 | 438 (40) | 74 (6.8) |
| 1251–1500 | 1296 | 269 (20.8) | 33 (2.5) |
| Subtotal (≤1500) | 3490 | 1468 (42) | 395 (11) |
| 1501–2000 | 1944 | 201 (10.3) | 19 (1) |
| >2000 | 681 | 26 (3.8) | – |
| Total | 6115 | 1695 (27) | 414 (6.7) |
ROP, retinopathy of prematurity.