| COPD | Controls |
Subjects n | 114 | 28 |
Male/female n | 99/15 | 11/17 |
Age yrs | 62±8 | 51±4 |
Current/ex-smokers n | 72/42 | 27/1 |
Smoking history pack-yrs# | 42 (31–55) | 31 (25–37) |
Postbronchodilator FEV1 % pred | 63±9 | 108±12 |
Postbronchodilator FEV1/IVC % | 48±9 | 78±4 |
PC20 methacholine mg·mL−1¶ | 0.6±2.8 | 26.7±1.7 |