Demographic and anthropometric data for all healthy subjects and chronic obstructive pulmonary disease(COPD) patients
| Healthy | COPD | p-value | |
| Subjects n | 100 | 30 | |
| Age yrs | 40.0±17.4 | 66.6±7.82 | <0.001 |
| Height m | 1.65±0.08 | 1.67±0.08 | 0.29 |
| Weight kg | 62.9±12.1 | 63.9±13.9 | 0.75 |
| BMI kg·m−2 | 23.0±3.26 | 23.0±4.39 | 0.95 |
| Male % | 56.0 | 73.3 | 0.14 |
| FEV1 % pred | 104.5±14.3 | 34.8±13.9 | |
| VC % pred | 106.4±13.4 | 83.0±18.6 |
Data are presented as mean±sd, unless otherwise stated. BMI: body mass index; FEV1: forced expiratory volume in one second; % pred: % predicted; VC: vital capacity.