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Table 2 Patient baseline characteristics
| Baseline characteristics | Median (IQR) |
|---|---|
| Age (month) | 4.5 (2.8–10.0) |
| Body weight (kg) | 4.0 (2.9–6.8) |
| Male gender (%) | 80 |
| RACHS-1 | 3 (2–3) |
| Palliative operation (%) | 40 |
| Mechanical ventilation (hours) | 75 (9–288) |
| Cardiac diagnosis | n (%) |
| HLHS | 5 (25) |
| CAVSD | 4 (20) |
| VSD | 3 (15) |
| TOF | 2 (10) |
| Others (SA/SV, TGA, DORV, TAPVR, IAA, TA) | 6 (30) |
| Cause of acute respiratory failure | n (%) |
| Atelectasis | 5 (25) |
| Heart failure/fluid overload | 4 (20) |
| Uncontrolled airway secretion | 4 (20) |
| Upper airway obstruction | 2 (10) |
| Airway bleeding | 1 (5) |
| Hypoventilation (due to sedative drugs) | 1 (5) |
| Weak cough | 1 (5) |
| Unclassified | 2 (10) |
| Outcomes | n (% or IQR) |
| HFNC failure, n (%) | 1 (5) |
| 24 h reintubation, n (%) | 1 (5) |
| ICU length of stay (days) | 11 (7.5–17) |
