Table 1.
Demographics of patients used in this study
| COPD (n=33) | Smokers (n=19) | |
|---|---|---|
| Sex (M/F) | 17/16 | 7/12 |
| Age, years | 68.7±7.9 | 63.7±8.9 |
| FEV1 | 1.84±0.60 | 2.53±0.61 |
| FEV1 % predicted | 73.4±17.5 | 99.3±20.0 |
| FEV1/FVC % ratio | 59.6±11.1 | 75.1±0.1 |
| Smoking status (current/ex) | 21/12 | 7/12 |
| Smoking history (pack-years) | 42 (13–126) | 37 (2–71) |
| ICS use? (yes/no) | 8/25 | 0/19 |
| GOLD stage (I/II/III/IV) | 10/20/3/0 | NA |
Note: Data are presented as mean ± standard deviation or mean (range).
Abbreviations: FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; ICS, inhaled corticosteroid; M, male; F, female; ex, ex-smoker; GOLD, Global Initiative for Chronic Obstructive Lung Disease; COPD, chronic obstructive pulmonary disease; NA, not applicable.