Table 1 Information about the participants in this study
|  | Non-smokers (n = 6) | Smokers without COPD (n = 7) | Smokers with COPD (n = 7) |
|---|---|---|---|
Gender (F/M) | 5/1 | 0/7 | 0/7 |
Age(years) | 53.83 ± 6.59 | 55.43 ± 11.59 | 60.14 ± 11.82 |
Smoking history(pack-years) | 0 | 23.33 ± 10.84** | 38.93 ± 21.24** |
FEV1/FVC% | 80.50 (79.25, 81) | 77 (75, 77.50)* | 65.34 (63, 67)**## |
FEV1(%predicted) | 96.17 ± 1.83 | 95.89 ± 5.31 | 78.57 ± 5.06**## |
BMI (kg/m2) | 23.75 (23.41, 24.04) | 25.51 (24.51, 26.97) | 24.97 (24.12, 25.85) |
Disease constitution | Â | Â | Â |
 Lung adenocarcinoma | 5 | 5 | 2 |
 Lung squamous cell carcinoma | 0 | 0 | 4 |
 Lung benign nodules | 1 | 2 | 1 |
 Quantitative CT measurements |  |  |  |
 %LAA-950 | 0.37 ± 0.23 | 0.52 ± 0.83 | 3.03 ± 1.87# |
 Pi10 | 5.69 ± 0.54 | 5.97 ± 0.12 | 6.48 ± 0.97 |