Table 1.
Demographic characteristics of the patients with COPD
| COPD (n = 52) | Control (n = 16) | P value | |
|---|---|---|---|
| Age | 66 ± 8 | 65 ± 8 | NS |
| Male/female | 29 M, 23 F | 6 M, 10 F | |
| Smoking history (pack year) | 42 (27.5, 60) | 0 (0, 10) | <0.001 |
| Weight (kg) | 65.7 (58.4, 76.1) | 65.4 (61.0, 74.1) | NS |
| BMI (kg/m2) | 23.3 (21.4, 26.3) | 24.8 (23.5, 26.2) | NS |
| FFMI (kg/m2) | 15.3 (14.5, 16.8) | 16.0 (16.9, 15.2) | NS |
| FEV1% | 41.1 (27.0, 48.5) | 106.8 (100.5, 111.5) | <0.001 |
| TLCO% | 45.0 (32.1, 52.4) | 87.5 (80.8, 98.1) | <0.001 |
| 6MWD% | 81 (58, 91) | 129 (123, 130) | <0.001 |
| MVC (kg) | 26.7 (20.6, 34) | 34.1 (27.9, 37.2) | 0.032 |
| MVC/FFM (kg) | 0.64 (0.51, 0.75) | 0.73 (0.61, 0.87) | 0.045 |
Data are presented as mean ± SD for normally distributed data and as median (interquartile range) for data that is not normally distributed.
BMI, body mass index; FFMI, fat free mass index; FEV1%, forced expiratory volume in 1 s (% of predicted value); TLCO, transfer capacity of the lung for CO (% of predicted value); 6MWD%, 6 min walk distance (% of predicted value); MVC, maximum voluntary contraction.