Table S1. Baseline characteristics according to each type.
| Variables | Subglottic type (n=28) | Stoma type (n=31) | Cuff type (n=18) | Tip type (n=22) |
|---|---|---|---|---|
| Age (years) | 56 (48–65) | 63 (49–71) | 70 (43–75) | 44 (23–61) |
| Male | 17 (60.7) | 16 (51.6) | 8 (44.4) | 11 (50.0) |
| Body mass index (kg/m2) | 21.7 (20.4–23.8) | 21.4 (19.7–23.6) | 21.1 (18.1–22.1) | 20.3 (17.7–22.9) |
| Poor performance status* | 15 (53.6) | 19 (61.3) | 12 (66.7) | 16 (72.7) |
| Reason for tracheostomy | ||||
| Medical | 25 (89.3) | 21 (67.7) | 13 (72.2) | 13 (59.1) |
| Neurological disease | 14 (50.0) | 5 (16.1) | 10 (55.6) | 6 (27.3) |
| Respiratory failure | 6 (21.4) | 8 (25.8) | 2 (11.1) | 3 (13.6) |
| Heart failure | 1 (3.6) | 5 (16.1) | 1 (5.6) | 2 (9.1) |
| Septic shock | 1 (3.6) | 2 (6.5) | 0 | 0 |
| Burn | 1 (3.6) | 1 (3.2) | 0 | 1 (4.5) |
| Drug intoxication | 1 (3.6) | 0 | 0 | 1 (4.5) |
| Obesity | 1 (3.6) | 0 | 0 | 0 |
| Trauma | 3 (10.7) | 10 (32.3) | 5 (27.8) | 9 (40.9) |
| Previous treatment history at another hospital | 6 (21.4) | 7 (22.6) | 5 (27.8) | 8 (36.4) |
| Severity of stenosis (Myer and Cotton grade‡) | ||||
| I | 2 (7.1) | 1 (3.2) | 0 | 2 (9.1) |
| II | 2 (7.1) | 3 (9.7) | 3 (16.7) | 2 (9.1) |
| III | 3 (10.7) | 4 (12.9) | 2 (11.1) | 0 |
| IV | 21 (75.0) | 23 (74.2) | 13 (72.2) | 18 (81.8) |
| Length of stenosis (mm) | 30 (21–35) | 25 (19–30) | 31 (20–41) | 20 (15–32) |
| Stenosis type | ||||
| Fibrosis | 21 (75.0) | 27 (87.1) | 14 (77.8) | 12 (54.5) |
| Granulation | 17 (60.7) | 16 (51.6) | 8 (44.4) | 15 (68.2) |
| Malacia | 5 (17.9) | 6 (19.4) | 5 (27.8) | 4 (18.2) |
| Mixed | 14 (50.0) | 18 (58.1) | 8 (44.4) | 8 (36.4) |
Data are presented as n (%) or median (IQR). *, Eastern Cooperative Oncology Group (ECOG) performance grade ≥3 means patients were confined to a bed or chair more than 50% of the day; ‡, categorization based on the percentage of reduction in cross-sectional area: grade 1, ≤50% lumenal stenosis; grade II, 51–70% lumenal stenosis; grade III, 71–99% lumenal stenosis; grade IV, no lumen, intubation or tracheostomy state due to respiratory failure before interventional bronchoscopy. IQR, interquartile range.