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Table 3 Comparison of the mean airway dimensions in asthma and COPD patients.

From: Relationship between airway inflammation and remodeling in patients with asthma and chronic obstructive pulmonary disease

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