Table 1.
Clinical and lung function data
| COPD patients | Healthy subjects | |
|---|---|---|
| Age (yrs) | 63 ± 2** | 46 ± 1 |
| BMI (Kg/m2) | 24.7 ± 1.1 | 26.5 ± 0.6 |
| Smoking history (pack-yr) | 62 ± 6** | 2.5 ± 2 |
| FEV1 (%reference) | 29 ± 2.5** | 98 ± 5 |
| FEV1/FVC (%) | 37 ± 2** | 73± 2 |
| PaO2 (mmHg) | 70 ± 3.3 | NA |
| PaCO2 (mmHg) | 42 ± 2.3 | NA |
| SaO2% | 95 ± 3* | 97± 0.4 |
| MIP (% reference) | 68 ± 6** | 96 ± 8 |
Abbreviations: BMI, body mass index; FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; PaO2, arterial partial pressure of oxygen; PaCO2, arterial partial pressure of carbon dioxide; MIP, maximal inspiratory pressure; NA, not available.
**
p < 0.01.