Clinical data of infants included in this study
| Variable | |
| Male sex* | 10 (50) |
| Gestational age at birth (weeks) | 26.2 (25.3–27.1) |
| Corrected gestation (weeks) | 28.8 (27.8–31.2) |
| Postnatal age (days) | 17 (14–24) |
| Birth weight (g) | 735 (583–892) |
| Weight at study (g) | 930 (753–1030) |
| Singleton* | 14 (70) |
| CPAP level at onset (cm H2O) | 6.5 (6.0–7.0) |
| Caffeine citrate dose (mg/kg/day) | 6.9 (4.5–9.0) |
| Prestudy Hb (g/L) | 124 (112–145) |
*N (%); all other data shown are median (IQR).
CPAP, continuous positive airway pressure.