Table 4.
Incidence of No ROP, mild ROP, and severe ROP
| No ROP, N (%) | Mild ROP, N (%) | Severe ROP, N (%) | Total ROP, N (%) | Total, N | |
|---|---|---|---|---|---|
| BW, g | |||||
| ≤ 750 | 2 (10.5) | 8 (42.1) | 9 (47.4) | 17 (89.5) | 19 |
| 751–1000 | 77 (35.3) | 113 (51.8) | 28 (12.8) | 141 (64.7) | 218 |
| 1001–1250 | 279 (57.5) | 180 (37.1) | 26 (5.4) | 206 (42.5) | 485 |
| 1251–1500 | 556 (79.5) | 132 (18.9) | 11 (1.6) | 143 (20.5) | 699 |
| 1501–2000 | 1428 (90.5) | 147 (9.3) | 3 (0.2) | 150 (9.5) | 1578 |
| > 2000 | 999 (93.4) | 70 (6.5) | 1 (0.1) | 71 (6.6) | 1070 |
| Total | 3341 (82.1) | 650 (16.0) | 78 (1.9) | 728 (17.9) | 4069 |
| GA, weeks | |||||
| GA ≤ 26w | 14 (14.3) | 61 (62.2) | 23 (23.5) | 84 (85.7) | 98 |
| 27-28w | 163 (51.1) | 130 (40.8) | 26 (8.2) | 156 (48.9) | 319 |
| 29-30w | 507 (77.5) | 131 (20.0) | 16 (2.4) | 147 (22.5) | 654 |
| 31-32w | 1007 (90.1) | 103 (9.2) | 8 (0.7) | 111 (9.9) | 1118 |
| 33-34w | 1036 (93.2) | 73 (6.6) | 3 (0.3) | 76 (6.8) | 1112 |
| ≥ 35w | 614 (79.9) | 153 (19.9) | 1 (0.1) | 154 (20.1) | 768 |
| Total | 3341 (82.1) | 650 (16.0) | 78 (1.9) | 728 (17.9) | 4069 |