Comparison of the characteristics of the two groups
| Regimen A | Regimen B (restricted) | |
| Gestational age (weeks) | 27.5 (23–33) | 27 (23–33) |
| Birth weight (g) | 914 (486–1500) | 980 (522–1499) |
| Small for dates | 17 (20) | 15 (18) |
| Caesarean section | 38 (45) | 44 (52) |
| Male | 38 (45) | 42 (50) |
| Antenatal steroids | 56 (67) | 60 (71) |
| Surfactant | 57 (68) | 60 (71) |
| In the first 48 hours | ||
| Max PIP (cm H2O) | 19 (12–40) | 20 (14–42) |
| Max Fio 2 | 0.63 (0.21–1.00) | 0.65 (0.21–1.00) |
Data are given as median (range) or n (%). The total number of infants in each group was 84.
Fio 2, fraction of inspired oxygen concentration; PIP, peak inspired pressure.