Patients n | 111 | 60 | |
Demographic characteristics | | | |
Age yrs | 59.7±7.9 | 60.4±7.4 | 0.576 |
Males | 75 (68) | 48 (80) | 0.084 |
White# | 111 (100) | 59 (98) | |
BMI kg·m−2 | 22.9±3.8 | 23.8±3.8 | 0.168 |
Smoking history | | | |
Ever smoked | 109 (98) | 60 (100) | |
Yrs of smoking | 33.7±8.9 | 34.3±8.1 | 0.700 |
Pack-yrs | 76.9±6.1 | 47.1±19.6 | 0.413 |
Receiving oxygen therapy | 80 (72) | 29 (48) | 0.002 |
Arterial blood gas¶ | | | |
Pa,O2 mmHg | 69.3±10.6 | 69.7±11.5 | 0.814 |
Pa,CO2 mmHg | 38.9±4.6 | 38.6±5.3 | 0.691 |
Lung function | | | |
FEV1 L | 0.91±0.29 | 0.94±0.30 | 0.529 |
FEV1 % pred | 29±8 | 30±8 | 0.451 |
FVC L | 2.50±0.73 | 2.67±0.86 | 0.158 |
FVC % pred | 61±13 | 65±17 | 0.158 |
DL,CO mL·min−1·mmHg−1 | 9.77±3.83 | 9.67±3.51 | 0.861 |
RV L | 5.02±1.16 | 4.98±1.07 | 0.814 |
RV % pred | 240±51 | 240±47 | 0.948 |
TLC L | 7.82±1.47 | 7.94±1.18 | 0.597 |
TLC % pred | 127±15 | 129±14 | 0.117 |
Exercise performance, quality of life | | | |
Cycle ergometry peak workload W | 46.9±20.3 | 52.2±23.4 | 0.117 |
6MWD m | 341±108 | 360±117 | 0.396 |
SGRQ | 59±13 | 56±18 | 0.150 |