Table 1.
Clinical characteristics of participants in lung tissues study group (means± SD)
| Characteristics | Nonsmokers (n = 11) | Healthy Smokers (n = 18) | COPD (n = 16) |
|---|---|---|---|
| Age (years) | 56.82 ± 12.31 | 56.44 ± 8.18 | 65.56 ± 6.79 |
| Gender, Male (Female) | 9 (2) | 18 (0) | 16 (0) |
| Smoking index | 0 | 462.2 ± 229.8 | 531.3 ± 262.6 |
| Smoking status, current (former) | 0 (0) | 17 (1) | 16 (0) |
| FEV1/FVC (%) | 81.45 ± 4.58 | 79.68 ± 4.52 | 64.51 ± 4.41 |
| FEV1.pred (%) | 113.40 ± 10.75 | 108.20 ± 15.24 | 82.07 ± 13.38 |
| DLCO (%) | 105.80 ± 10.77 | 86.90 ± 20.92 | 90.12 ± 21.18 |
| GOLD stage (numbers) | |||
| I | 10 | ||
| II | 6 | ||
| III | 0 | ||
| IV | 0 | ||
| Inhaled steroids (numbers) | 0 |