Table 1

Incidence of ROP, mean gestational age at birth (weeks), and mean birth weight (g)

No (%)Mean gestational age (weeks) (range)Mean birth weight (g) (range)
No ROP292 (74.5)30.3 (25–32)1516 (616–2705)
ROP 1 22 (5.6)28.1 (24–32)1136 (734–1750)
ROP 2 30 (7.7)27.7 (24–32)1075 (634–1885)
ROP 3 46 (11.7)25.9 (23–31) 876 (591–1640)
ROP 4 2 (0.5)24.5 (24–25) 544 (462–626)
ROP 5 0