Table 2 Etiology and location of patients with CAO undergoing flexible bronchoscopy or rigid bronchoscopy
| Â | N (%) | P value | ||
|---|---|---|---|---|
Flexible (204) | Rigid (171) | Total (375) | ||
Etiology of CAO | ||||
 Lung tumor | 79 (38.7%) | 57 (33.3%) | 136 (36.3) | 0.418 |
 Esophageal cancer | 45 (22.1%) | 42 (24.6%) | 87 (23.2) |  |
 Tracheal tumor | 39 (19.2%) | 26 (15.2%) | 65 (17.4%) |  |
 Scarring | 25 (12.3%) | 23 (13.5%) | 48 (12.8%) |  |
 Post-placement of stenting | 9 (4.4%) | 13 (7.9%) | 22 (5.6%) |  |
 Thyroid tumor | 4 (2.0%) | 4 (2.3%) | 8 (2.1%) |  |
 Lymphoma | 1 (0.5%) | 3 (1.8%) | 4 (1.1%) |  |
 Tuberculosis | 2 (1.0%) | 3 (1.8%) | 5 (1.3%) |  |
Benign/Malignant | ||||
 Benign | 72 (35.3%) | 45 (26.3%) | 117 (31.2%) | 0.062 |
 Malignant | 132 (74.7%) | 126 (73.7%) | 258 (68.8%) |  |
Location of CAO | ||||
 Tracheal | 130 (63.7%) | 120 (73.2%) | 250 (66.7%) | 0.187 |
 Left or right main bronchus | 74 (36.3%) | 51 (29.8%) | 125 (33.3%) |  |