Table 2

Relation of ROP to gestational age at birth in the two consecutive groups

Gestational age at birth (weeks)
≤ 2627–2930–32≥33
19902000199020001990200019902000
No ROP (%)10 (28.6) 6 (10.5) 72 (57.6) 73 (69.5)53 (67.9)73 (89.0)20 (90.9)9 (100)
Mild ROP (%) 9 (25.7)16 (28.1) 30 (24.0) 23 (21.9)12 (15.4) 7 (8.6) 2 (9.1)0 (0)
Severe ROP (%)16 (45.7)35 (61.4) 23 (18.4) 9 (8.6)13 (16.7) 2 (2.4) 0 (0)0 (0)
Total ROP (%)25 (71.4)51 (89.5) 53 (42.4) 32 (30.5)25 (32.1) 9 (11.0) 2 (9.1)0 (0)
Totals35571251057882229