Table 3.
The incidence rate of ROP with different zones according to gestational age and birth weight.
| Non-ROP n (%) |
Zone 1 ROP n (%) |
Zone 2 ROP n (%) |
Zone 3 ROP n (%) |
AP-ROP n (%) |
Total infants n |
|
|---|---|---|---|---|---|---|
| GA, (W) | ||||||
| ≤26 | 8 (66.7) | 2 (16.7) | 2 (16.7) | 0 (0) | 3 (25.0) | 12 |
| 27-28 | 100 (64.1) | 12 (7.7) | 34 (21.8) | 10 (6.4) | 8 (5.1) | 156 |
| 29-30 | 396 (76.9) | 14 (2.7) | 77 (15.0) | 28 (5.4) | 7 (1.4) | 515 |
| 31-32 | 904 (88.5) | 11 (1.1) | 58 (5.7) | 47 (4.6) | 1 (0.1) | 1021 |
| 33-34 | 1139 (95.2) | 3 (0.3) | 28 (2.3) | 26 (2.2) | 0 (0) | 1196 |
| 35-36 | 94 (96.9) | 0 (0) | 2 (2.1) | 1 (1.0) | 0 (0) | 97 |
|
| ||||||
| Total | 2641 (88.1) | 42 (1.4) | 201 (6.7) | 112 (3.7) | 19 (0.6) | 2997 |
|
| ||||||
| BW, (g) | ||||||
| ≤1000 | 38 (54.3) | 12 (17.1) | 18 (25.7) | 2 (2.9) | 8 (11.4) | 70 |
| 1001–1250 | 166 (66.9) | 12 (4.8) | 55 (22.2) | 15 (6.0) | 5 (2.0) | 248 |
| 1251–1500 | 409 (81.5) | 7 (1.4) | 58 (11.6) | 28 (5.6) | 2 (0.4) | 502 |
| 1501–1750 | 481 (86.8) | 7 (1.3) | 34 (6.1) | 31 (5.6) | 2 (0.4) | 554 |
| 1751–2000 | 668 (93.3) | 2 (0.3) | 23 (3.2) | 23 (3.2) | 2 (0.3) | 716 |
| >2000 | 879 (96.9) | 2 (0.2) | 13 (1.4) | 13 (1.4) | 0 (0) | 907 |
|
| ||||||
| Total | 2641 (88.1) | 42 (1.4) | 201 (6.7) | 112 (3.7) | 19 (0.6) | 2997 |