Table 2.
The incidence rate of ROP with different stages according to gestational age and birth weight.
| Non-ROP n (%) |
Stage 1 ROP n (%) |
Stage 2 ROP n (%) |
Stage 3 ROP n (%) |
Treated ROP n (%) |
Total infants n |
|
|---|---|---|---|---|---|---|
| GA, (W) | ||||||
| ≤26 | 8 (66.7) | 0 (0) | 2 (16.7) | 2 (16.7) | 3 (25) | 12 |
| 27-28 | 100 (64.1) | 20 (12.8) | 26 (16.7) | 10 (6.4) | 18 (11.5) | 156 |
| 29-30 | 396 (76.9) | 41 (8.0) | 65 (12.6) | 13 (2.5) | 20 (3.9) | 515 |
| 31-32 | 904 (88.5) | 43 (4.2) | 62 (6.1) | 12 (1.2) | 15 (1.5) | 1021 |
| 33-34 | 1139 (95.2) | 34 (2.8) | 22 (1.8) | 1 (0.1) | 3 (0.3) | 1196 |
| 35-36 | 94 (96.9) | 0 (0) | 3 (3.1) | 0 (0) | 0 (0) | 97 |
|
| ||||||
| Total | 2641 (88.1) | 138 (4.6) | 180 (6.0) | 38 (1.3) | 59 (2.0) | 2997 |
|
| ||||||
| BW, (g) | ||||||
| ≤1000 | 38 (54.3) | 8 (11.4) | 15 (21.4) | 9 (12.9) | 15 (21.4) | 70 |
| 1001–1250 | 166 (66.9) | 23 (9.3) | 47 (19.0) | 12 (4.8) | 17 (6.9) | 248 |
| 1251–1500 | 409 (81.5) | 34 (6.8) | 51 (10.2) | 8 (1.6) | 10 (2.0) | 502 |
| 1501–1750 | 481 (86.8) | 34 (6.1) | 34 (6.1) | 5 (0.9) | 10 (1.8) | 554 |
| 1751–2000 | 668 (93.3) | 20 (2.8) | 25 (3.5) | 3 (0.4) | 5 (0.7) | 716 |
| >2000 | 879 (96.9) | 19 (2.1) | 8 (0.9) | 1 (0.1) | 2 (0.2) | 907 |
|
| ||||||
| Total | 2641 (88.1) | 138 (4.6) | 180 (6.0) | 38 (1.3) | 59 (2.0) | 2997 |