Table 2 Structural outcome at 2 years for infants with bilateral high‐risk prethreshold retinopathy of prematurity by the International Classification of Retinopathy Of Prematurity category and Risk Management of Retinopathy Of Prematurity 2 risk.
| ICROP classification | Eyes treated at high‐risk prethreshold | Conventionally managed eyes | Discordant pairs | |||
|---|---|---|---|---|---|---|
| Zone | Stage | Plus disease | n% UF | n% UF | A* | B† |
| I | 3 | Yes or no | 24 (25.0) | 24 (58.3) | 8 | 0 |
| I | 1 or 2 | Yes | 9 (22.2) | 9 (22.2) | 0 | 0 |
| I | 1 or 2 | No | 71 (4.2) | 71 (8.5) | 5 | 2 |
| II | 3 | Yes | 101 (8.9) | 101 (11.9) | 7 | 4 |
| II | 3 | No | 3 (0.0) | 3 (0.0) | 0 | 0 |
| II | 2 | Yes | 30 (20.0) | 30 (16.7) | 1 | 2 |
| RM‐ROP2 risk | ||||||
| 0.15–0.30 | 104 (7.7) | 104 (7.7) | 4 | 4 | ||
| 0.30–0.45 | 69 (8.7) | 69 (14.5) | 6 | 2 | ||
| ⩾0.45 | 72 (18.1) | 72 (33.3) | 13 | 2 | ||
UF, unfavourable.
ICROP, International Classification of Retinopathy Of Prematurity; RM‐ROP, Risk Management of Retinopathy Of Prematurity.
*For group A, earlier‐treated eyes had a favourable outcome, and conventionally managed eyes had an unfavourable outcome.
†For group B, earlier‐treated eyes had an unfavourable outcome, and conventionally managed eyes had a favourable outcome.