Table 2 Tracheal imaging characteristics
From: Expiratory central airway collapse in stable COPD and during exacerbations
Healthy Individuals (n = 53) | Stable COPD (n = 40) | AE COPD (n = 64) | |
|---|---|---|---|
Tracheal area ratio (%) | 74.5 ± 8.6 | 57.5 ± 19.8 | 53.8 ± 19.3 |
ECAC a n (% of group) | 0 | 14 (35%) | 25 (39%) |
EDAC+ n (% of group) | 0 | 10 (25%) | 15 (23%) |
TBM n (% of group) | 0 | Total = 4 (9%) Concentric: 4 | Total = 10 (16%) Sabre 4 Concentric 5 Crescentic 1 |
Anterior-posterior ratio | 74.4 ± 8.8 | 60 ± 18.1 | 56.3 ± 18 |
Lateral ratio | 84.2 ± 7.3 | 76.7 ± 11.8 | 76.6 ± 11.6 |