Table 2.
Subjects characteristics
| Variables | Normal non-smokers n = 10 | Normal smokers n = 10 | Emphysematous smokers n = 9 |
| Age, yr | 62 ± 2 | 58 ± 1 | 60 ± 1 |
| Gender, F/M | 3/7 | 2/8 | 2/7 |
| FEV1, % predicted | 112.2 ± 4.6 | 111.1 ± 4.1 | 39.6 ± 5.0* |
| FEV1/FVC | 95.6 ± 1.8 | 94.0 ± 5.8 | 44.6 ± 3.5* |
| GOLD stage I/II/III/IV | - | - | 0/2/5/2 |
| DLCO, % predicted | - | - | 53.4 ± 17.3 |
| Smoking history, pack-years | - | 43 ± 4 | 70 ± 8* |
| BMI (kg/m2) | 26.5 ± 1.1 | 27.0 ± 1.6 | 22.2 ± 0.6* |
| Presence of emphysema**, subjects | - | - | 9 |
* Significantly different from normal smokers and non-smokers (p < 0.05)
** Confirmed by CT scanning