Patient demographics and baseline characteristics (n=60)
| Gender F/M | 33/27 |
| Age, years | 60.9±7.5 |
| Pack-years | 39.5±18.2 |
| BMI, kg/m2 | 24.92±4.49 |
| FEV1, L | 0.83±0.25 |
| FEV1, % pred | 30.17±6.32 |
| FVC, L | 2.49±0.78 |
| FVC, % pred | 73.95±16.94 |
| FEV1/FVC | 0.34±0.07 |
| RV, L | 5.29±1.32 |
| RV, % pred | 249.2±53.2 |
| RV/TLC | 65.55±8.19 |
| 6MWD, m | 316±102 |
| SGRQ, points | 61.5±14.3 |
| Supplemental oxygen | 35/60 (58%) |
| mMRC, points | 3.0±0.75 |
Data are shown as mean±SD.
BMI, body mass index; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; mMRC, modified Medical Research Council dyspnoea score; 6MWD, 6-min walking distance; RV, residual volume; RV/TLC, residual volume to total lung capacity ratio; SGRQ, St George's Respiratory Questionnaire total score.