TA group treatment results
| evaluation time | airway diameter(mm) | Stricture rate(%) | Dyspnea score | Clinical stationary time(days) |
| before TA treatment | 3.10±1.83 | 77.08±13.63 | 3.45±0.51 | 10.95±5.49 |
| after TA treatment | 9.30±2.34 | 26.82±12.69 | 0.35±0.49 | 98.75±55.58 |
| Statistics | 13.102 | 10.455 | 20.743 | 5.724 |
p<0.01