Characteristics of infants with ROP specified per stage
| n | GA | BW | Examinations (n) | |
|---|---|---|---|---|
| ROP 1 | 196 | 28.4 (23 6/7–33) | 1030 (440–2040) | 3 (1–9) |
| ROP 2 | 98 | 27.4 (24 2/7–34) | 890 (530–1660) | 6 (2–12) |
| ROP 3 | 24 | 26.4 (24 2/7–31 3/ 7) | 913 (600–1880) | 6 (3–23) |
| ROP 4 | 2 | 30.7 (30–31 3/7) | 1223 (975–1470) | 4 (1–6) |
| ROP 5 | 4 | 25.7 (25 3/7–26 2/7) | 675 (520–806) | 13 (10–20) |
Median gestational age (GA), birth weight (BW) and number of screening examinations with minimum-maximum range in brackets.
ROP, retinopathy of prematurity.