Table 2.
Prevalence of systemic and ocular risk factors among infants studied for structural, visual, and refractive outcomes
| Characteristics | Structural outcome | Visual outcome | Refractive outcome |
|---|---|---|---|
| Pregnancy | |||
| Single, n (%) | 102 (68.9) | 53 (65.4) | 44 (61.1) |
| Multiple, n (%) | 46 (31.1) | 28 (34.6) | 28 (38.9) |
| IVH | |||
| Present, n (%) | 67 (45.3) | 39 (48.1) | 33 (45.8) |
| Absent, n (%) | 81 (54.7) | 42 (51.9) | 39 (54.2) |
| Sepsis | |||
| Present, n (%) | 76 (51.4) | 50 (61.7) | 42 (58.3) |
| Absent, n (%) | 72 (48.6) | 31 (38.3) | 30 (41.7) |
| Ventilated days | |||
| Mean ± SD | 24.0 ± 20.3 | 25.8 ± 20.7 | 26.6 ± 20.8 |
| Range | 0–98 | 0–98 | 0–98 |
| Eye zone | |||
| Zone I n (%) | 50 (18.5) | 38 (25.5) | 25 (19.1) |
| Zone II n (%) | 220 (81.5) | 111 (74.6) | 106 (80.9) |
| PCA (weeks) | |||
| Mean ± SD | 37.4 ± 2.2 | 37.2 ± 2.0 | 37.3 ± 1.9 |
| Range | 32–47 | 32–43 | 4–43 |
| ERP | |||
| Mean ± SD | 4.5 ± 1.8 | 4.5 ± 1.8 | 4.4 ± 1.6 |
| Range | 2–12 | 2–10 | 2–10 |
Abbreviations: IVH, intraventricular hemorrhage; SD, standard deviation; PCA, postconceptional age (at treatment); ERP, extraretinal proliferation.