Patient treatment characteristics
| Conventional | Trigger | |
| Surfactant doses: median (range) | 2 (0–3) | 2 (0–4) |
| Artificial surfactant (%) | 185 (96) | 189 (98) |
| Neuromuscular paralysis (%) | 12/193 (6) | 12/193 (6) |
| Diuretics (%) | 12/175 (7) | 13/169 (8) |
| Postnatal steroids (%) | 14/175 (8) | 12/169 (7) |