En route characteristics and short-term outcomes
| Characteristics | All patients (n=22) |
| FiO2, %, median (IQR) | 60 (50–70) |
| PEEP, mm Hg, median (IQR) | 10 (8–12) |
| Tidal volume, mL/kg, median (IQR) | 6.2 (6.0–6.4) |
| PaO2/FiO2 during flight | 132 (116–197) |
| SOFA score, median (IQR) | 3 (3–6) |
| SOFA Respiratory score, median (IQR) | 3 (3–3) |
| SOFA Cardiovascular score, median (IQR) | 0 (0–3) |
| Event requiring medical intervention, n (%) | 12 (55) |
| Life-threatening event, n (%) | 0 |
| Respiratory event, n (%) | 7 (32) |
| Cardiovascular event, n (%) | 2 (9) |
| Other event, n (%) | 5 (23) |
| O2 consumption, L/hour, median (IQR) | 341 (290–444) |
| Short-term outcomes | |
| Mechanical ventilation on day 1, n (%) | 22 (100) |
| Alive on day 1, n (%) | 22 (100) |
| Mechanical ventilation on day 7, n (%) | 12 (55) |
| Alive on day 7, n (%) | 21 (95) |
FiO2, O2 inspired fraction; PEEP, positive end-expiratory pressure; SOFA, Sequential Organ Failure Assessment score.