Table 3 Comparison of the mean airway dimensions in asthma and COPD patients.
Variable | Asthma (n = 9) | COPD (n = 11) | P |
|---|---|---|---|
Outer airway diameter - D (mm) | 3.1 ± 0.7 | 2.7 ± 0.4 | NS |
Internal airway diameter - L (mm) | 1.4 ± 0.3 | 1.3 ± 0.3 | NS |
Luminal area - AL (mm2) | 1.8 ± 0.7 | 1.6 ± 0.7 | NS |
Wall area - WA (mm2) | 6.7 ± 2.7 | 4.9 ± 1.3 | NS |
Wall thickness - WT (mm) | 0.9 ± 0.2 | 0.7 ± 0.1 | NS |
Bronchial wall thickness (WT/D ratio) | 0.28 ± 0.02 | 0.27 ± 0.02 | NS |
The percentage wall area (WA%) | 79 ± 4 | 78 ± 3 | NS |