Characteristics of the study population
| COPD | Controls | Statistical difference | |
| Subjects n | 11 | 12 | |
| Age yrs | 65±3.6 | 58±1.5 | ns |
| Height cm | 168±2.9 | 171±2.7 | ns |
| Weight kg | 73±4.9 | 77±4 | ns |
| BMI kg·m2 | 25.81±1.2 | 26±0.8 | ns |
| FEV1 L | 1.15±0.11 | 3.29±0.2 | *** |
| FEV1 % pred | 41±3.4 | 102±5.3 | *** |
| Physical activity score | 7.6±1.9 | 6.6±1.1 | ns |
Data are presented as mean±sem unless otherwise indicated
BMI: body mass index
FEV1: forced expiratory volume in one second
COPD: chronic obstructive pulmonary disease
pred: predicted
***: p<0.001
ns: nonsignificant difference between groups