Figure 1From: Airway wall thickness is increased in COPD patients with bronchodilator responsivenessAirway dimensions in those that are BDR + (10%) and BDR-(10%) according to GOLD stage. Data presented as mean ± SD. A) Pi10, B) Pi15, and C) WA%. *p < 0.05. †p < 0.0001.Back to article page