Table 1.
Baseline characteristics of the included patients with COPD
| Mean ± SD | Median | Minimum | Maximum | |
|---|---|---|---|---|
| Age (years) | 67.1 ± 5.4 | 65.6 | 61.6 | 76.2 |
| FEV1 (L) | 0.78 ± 0.14 | 0.81 | 0.60 | 0.93 |
| VC (L) | 2.38 ± 0.92 | 2.16 | 1.24 | 3.63 |
| FEV1/VC (%) | 35.40 ± 10.33 | 34.00 | 22.00 | 48.00 |
| TLC (L) | 6.63 ± 1.79 | 6.99 | 4.91 | 9.19 |
| FRC (L) | 5.11 ± 1.49 | 4.82 | 3.59 | 7.28 |
| Raw (kPa.s/L) | 1.12 ± 0.17 | 1.04 | 1.00 | 1.41 |
Abbreviations: FEV1, forced expiratory volume in 1 second; VC, vital capacity; TLC, total lung capacity; SD, standard deviation; FRC, functional residual capacity.