Table 2:
Characteristics of S and NS group
| Variables | S group (n = 12) | NS group (n = 13) | P-value |
|---|---|---|---|
| Sex (male), n (%) | 8 (66.7) | 9 (69.2) | 0.89 |
| Age (months), median (IQR) | 4.4 (2.0–6.3) | 3.4 (2.0–4.0) | 0.34 |
| Body weight (kg), median (IQR) | 5.7 (3.1–7.9) | 4.5 (3.2–5.1) | 0.21 |
| Cardiac disease, n (%) | 0.12 | ||
| Interrupted aortic arch | 3 (25.0) | 3 (23.1) | |
| Tetralogy of Fallot | 4 (33.3) | 1 (7.7) | |
| Coarctation of aorta | 4 (30.8) | ||
| Others | 5 (41.7) | 5 (38.5) | |
| Preoperative symptom, n (%) | 0.39 | ||
| Dyspnoea due to heart failure | 6 (50.0) | 7 (53.8) | |
| Tachycardia | 3 (25.0) | 1 (7.7) | |
| Others (tachypnoea, poor oral intake) | 2 (15.4) | ||
| No symptom | 3 (25.0) | 3 (23.1) | |
| Preoperative trachea, median (IQR) | |||
| Narrowest diameter (mm) | 2.8 (2.2–3.2) | 5.8 (5.2–6.5) | <0.001 |
| Narrowest diameter/body weight (mm/kg) | 0.6 (0.4–0.7) | 1.4 (1.1–1.7) | <0.001 |
| Broadest diameter (mm) | 6.6 (5.6–7.0) | 7.0 (6.3–7.9) | 0.61 |
| Total tracheal length (mm) | 38.3 (30.2–46.5) | 36.5 (33.8–38.5) | 0.62 |
| Total tracheal length/body weight (mm/kg) | 7.4 (5.8–7.9) | 9.2 (6.9–11.1) | 0.14 |
| Bronchoscopy and/or laryngoscopy, n (%) | 0.07 | ||
| Tracheal stenosis | 7 (58.3) | 7 (53.8) | |
| Tracheomalacia | 5 (41.7) | 2 (15.4) | |
| Laryngomalacia | 4 (30.8) |
IQR: interquartile range; NS: no-stenosis; S: stenosis.