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ROP: retinopathy of prematurity
| Variables | Classification | Total number, N (%) |
| Zone | Zone 1 | 43 (21.5%) |
| Zone 2 | 53 (26.5%) | |
| Zone 3 | 104 (52%) | |
| Stage | Stage 1 | 76 (38%) |
| Stage 2 | 85 (42.5%) | |
| Stage 3 | 39 (19.5%) | |
| Stage 4 | 0 (0%) | |
| Stage 5 | 0 (0%) | |
| Plus disease | No | 124 (62%) |
| Yes | 76 (38%) | |
| ROP final stage | Regressing | 76 (38%) |
| Regressed ROP | 30 (15%) | |
| Mature retina | 94 (94%) | |
| Treatment (N = 76) | Avastin injection | 52 (68.4%) |
| Laser | 24 (31.6%) |
