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Number of infants with various stages of ROP who would have been missed, if the present screening criterion of ≤32 weeks of gestation at birth had been reduced to ≤31, ≤30, ≤29, and ≤28 weeks
| Screening criteria (weeks) | No of infants fulfilling criteria | No of infants missed with mild ROP | No of infants missed with severe ROP (not threshold) | No of infants missed with “threshold” (treated) ROP |
| ≤32 | 392 | 0 | 0 | 0 |
| ≤31 | 299 | 5 | 0 | 0 |
| ≤30 | 234 | 7 | 1 | 0 |
| ≤29 | 169 | 13 | 2 | 0 |
| ≤28 | 119 | 18 | 3 | 1 |
