Secondary outcome data
| Conventional n=193 | Trigger n=193 | Odds ratio (95% CI) | |
| Death before 28 days (%) | 7 (3.6) | 15 (7.8) | 0.45 (0.15–1.20) |
| Death before 36 weeks (%) | 8 (4.1) | 15 (7.8) | 0.51 (0.18–1.33) |
| Pneumothorax (%) | 21 (11) | 20 (10) | 1.06 (0.52–2.13) |
| IVH total population | |||
| Grade III (%) | 13 (7) | 11 (6) | 1.19 (0.48–3.03) |
| Grade III IVH/death (%) | 20 (10) | 22 (11) | 0.90 (0.48–1.80) |
| IVH survivors | |||
| Grade III (%) | 12 (6) | 7 (4) | 1.69 (0.60–5.20) |
| Cystic PVL survivors (%) | 12 (6) | 8 (5) | 1.47 (0.54–4.26) |
| Shunt insertion survivors (%) | 11 (6) | 5 (3) | 2.19 (0.68–8.19) |
IVH = intraventricular haemorrhage; PVL = periventricular leucomalacia;