Demographics of Study Population (n = 30)
| GA at time of study | 31.7 (30.7, 33.5) |
| Postnatal age in days | 43 (23.5, 53.5) |
| Weight in kg at time of study | 1.4 (1.1, 1.6) |
| Insignificant PDA/PFO | 6/8 |
| Surfactant (given at birth / 2nd dose) | 25/7 |
| Ventilated before study | 27 |
| Bubble CPAP /ventilator CPAP | 24/6 |
| CPAP requirement (5/6/7 cm H2O)) | 13/7/10 |
| O2 requirement (%) | 30 (25,30) |
| Capillary gas: pH | 7.35 (7.34, 7.39) |
| Capillary gas: pCO2 (mmHg) | 53 (47, 55) |
| Capillary gas: HCO3 - (mmol/l) | 29 (25, 34) |
| Capillary gas: base excess | 2.6 (-0.4, 4.8) |
| Respiratory support at 36 weeks GA | 12 |
| O2 requirement at 36 weeks GA | 25 |
| Values given as median (IQR) or absolute numbers. | |