Table 1.
General clinical characteristics of non-smokers, smokers, and COPD patients
| Parameters | Non-smokers | Smokers | COPD |
|---|---|---|---|
| Number of subjects | 8 | 8 | 8 |
| M:F ratio | 6:2 | 7:1 | 5:3 |
| Male:female (%) | (75%:25%) | (87.5%:12.5%) | (62.5%:37.5%) |
| Age, year | 62.62 ± 1.87 | 61 ± 2.33 | 56.1 ± 2.57 |
| (55–69) | (52–71) | (45–63) | |
| Smoking, pack years | – | 27.14 ± 5.96*** | 28.8 ± 4.32*** |
| (10–50)a | (10–43)a | ||
| FEV1 % predicted | 100.28 ± 5.55 | 88.75 ± 4.04 | 23 ± 4.41***; ### |
| (81–124)b | (68–102) | (10–43) | |
| FEV1/FVC % | 0.79 ± 0.01 | 0.81 ± 0.02 | 0.33 ± 0.03***; ### |
| (0.73–0.85)b | (0.75–0.95) | (0.25–0.5) |
aNo pack years details for one subject in the smokers and COPD groups
bNo FEV1 % predicted (one subject) and FEV1/FVC % values (two subjects) in the non-smokers group
*** P < 0.001 vs. non-smokers, ### P < 0.001 vs. smokers
M:F Male to Female ratio, FEV 1 forced expiratory volume in 1 s