Table 1.
Characteristics of subjects included in the study.
| Non-COPD Control (n = 12) | COPD GOLD III–IV (n = 12) | |
|---|---|---|
| Sex (M/F/NA) | 3/7/2 | 3/9/0 |
| Smoking (current/ex/never) | 2/5/3 | 0/12/0 |
| Age (years-range) | 66.2 (53–79) | 58.7 (51–68) |
| FEV1%Pred | 106.4 (80–131) | 25.0 (12–63) |
| FEV1/FVC | 75.6 (65.0–89.9) | 38.8 (21.9–89.2) |
FEV1%Pred = Predicted value for Forced Expiratory Volume in 1 s; FEV1 = Forced Expiratory Volume in 1 s; FVC = Forced Vital Capacity. NA = not available. For age, FEV1%Pred and FEV1/FVC, group medians with ranges are shown. Exclusion criteria for subject inclusion in the study were the diagnosis of asthma, indications of lung infection, COPD GOLD stage classification of I or II or abnormalities in tissue structure.