Distribution of the shape, location and severity of tracheomalacia according to Any-TM and ERS-TM diagnostic scoring criteria
| Any-TM | ERS-TM* | ||
| Bronchiectasis N=45 | Control subjects N=90 | Bronchiectasis N=45 | |
| Tracheomalacia present | 14 | 3 | 9 |
| Shape | |||
| Triangular (left to right) | 1 | 0 | 1 |
| Triangular (right to left) | 2 | 1 | 0 |
| Oval/flattening | 8 | 2 | 6 |
| Bulging pars membranosa | 2 | 0 | 2 |
| Other | 1 | 0 | 0 |
| Location | |||
| Junction upper-middle third | 0 | 1 | 0 |
| Middle third | 4 | 2 | 3 |
| Junction middle-lower third | 5 | 0 | 3 |
| Lower third | 4 | 0 | 2 |
| Throughout | 1 | 0 | 1 |
| Severity | |||
| Mild (<50%) | 5 | 3 | Mild (50%–75%) 7 |
| Moderate (50%–75%) | 7 | 0 | Moderate (75%–90%) 1 |
| Severe (>75%–90%) | 1 | 0 | Severe (>90%) 1 |
| Very severe (>90%) | 1 | 0 | |
Any-TM, presence of any tracheomalacia; ERS-TM, European Respiratory Society definition of tracheomalacia requiring >50% reduction in cross-sectional luminal area during quiet breathing.4
*Tracheomalacia was not observed in controls using ERS-TM criteria.