Table 1.
Clinical Characteristics of the Enrolled Subjects from Whom Bronchial Epithelial Cells Were Collected
| Nonsmokers Without COPD (Control-NS) (n=8) | Smokers Without COPD (Control-S) (n=9) | Patients with COPD (n=16) | Between-Group Differences (p value) | |
|---|---|---|---|---|
| Age, y | 56.50±8.144 | 61.56±3.930 | 66.11±2.019 | 0.432 |
| Sex ratio (F/M) | 0/8 | 0/9 | 0/16 | 1.000 |
| Pack-years | 0±0 | 39.38±8.042 | 47.03±8.860 | 0.0014 |
| FEV1/FVC | 88.63±6.57 | 83.73±4.28 | 57.45±9.31 | 0.000 |
| FEV1% pred | 105.5±10.07 | 88.70±5.33 | 55.14±13.40 | 0.000 |
Note: Values are presented as the means ± SD.
Abbreviations: COPD, chronic obstructive pulmonary disease; pack-year, number of cigarettes smoked per day/20 (pack) × duration of smoking (year); FEV1, forced expiratory volume in one second; FVC, forced vital capacity; FEV1% pred, forced expiratory volume in one second per cent predicted.