Table 1 Population characteristics
From: From blood to lung tissue: effect of cigarette smoke on DNA methylation and lung function
| Â | LifeLines Cohort |
|---|---|
Number | 658 |
Males, N (%) | 375 (57,0) |
Age, years (range) | 46 (22–79) |
Pack year, years, mean (range) | 20,6 (5–100) |
FEV1/FVC (%), mean (range) | 71,7 (40,1 – 92,4) |
FEV1(%pred)*, mean (range) | 94,4 (47,7 – 138,4) |
COPD cases, N (%) | 279 (42,4) |
GOLD COPD Stage ≥ 2†, N (%) | 102 (15,6) |