Baseline characteristics
| Characteristic | Flow driver (n=59) | Bubble (n=66) | ||
|---|---|---|---|---|
| Boys, n % | 35 | 59% | 38 | 58% |
| Vaginal delivery, n % | 30 | 51% | 23 | 35% |
| Resuscitated at birth, n % | 10 | 17% | 18 | 27% |
| Full course of antenatal steroids, n % | 22 | 37% | 25 | 38% |
| Birth weight, g (mean SD) | 1848 | 431 | 1891 | 502 |
| Gestational age, weeks (median IQR) | 33 | 31–35 | 33 | 32–34 |
| Apgar score 1 min (median IQR) | 7 | 7–8 | 7 | 6–8 |
| Apgar score 5 min (median IQR) | 7 | 7–8 | 7 | 7–8 |