Fig. 4From: Phenotypic comparison between smoking and non-smoking chronic obstructive pulmonary diseasePanel (a) Change in FEV1 and FVC after 4 weeks of oral prednisolone (30 mg/day) in female non-smoking COPD patients (open bars) or placebo (black bars); data are mean values ± SEM; NS = non-significant; Panel (b) Decline in post-bronchodilator FEV1 between healthy (n = 88), smoking COPD (n = 44) and non-smoking COPD subjects (n = 62) over 2 yearsBack to article page