Table 1.
Patient characteristics
| Smokers (S‐C) | COPD smokers | p value | |
|---|---|---|---|
| Patients (n) | 13 | 14 | |
| Age (years) | 57 (48–67) | 60 (51–74) | ns |
| Sex (M/F) | 6/7 | 7/7 | |
| FEV1/VC | 81 (72/107) | 61 (42/69)*** | <0.001 |
| FEV1 (%) | 89 (76–113) | 73 (50–113)** | <0.001 |
|
GOLD (n) 0/I/II/III/IV |
13/0/0/0/0 | 0/4/10/0/0 | |
| Smoking history (pack‐yrs) | 43 (30–60) | 46 (20–75) | ns |
| Emphysema score (%) | 12.9 ± 3.5 | 45.3 ± 4.6** | <0.001 |
COPD: chronic obstructive pulmonary disease; GOLD: Global Initiative for Chronic Obstructive Lung Disease; VC: vital capacity; FEV1, forced expiratory volume in 1 s.
Emphysema score was assessed on 0%–100% scale.
Data are expressed as median with minimum and maximum quartiles (in parentheses), except for emphysema score, which is expressed as mean ± SEM.
**p < 0.01.
***p < 0.001 COPD patients vs. smokers.