|  | Control | COPD |
---|---|---|---|
Biopsy | Â | (n = 5) | (n = 8) |
 | Age (years) | 54.8 ± 7.16 | 65.0 ± 17.33 |
 | Sex (M:F) | 4:1 | 6:2 |
 | FEV1 (L) | 3.69 ± 0.89 | 2.31 ± 0.84 |
 | FEV1/FVC (ratio) | 0.83 ± 0.01 | 0.56 ± 0.08 |
 | GOLD Stage (I/II/III/IV) | 0/0/0/0 | 3/3/2/0 |
 | Smoking History |  |  |
 |    Pack Years | 3.4 ± 4.77 | 38.25 ± 14.76 |
 |    Current smokers | 0 | 5 |
 |    Ex-smokers | 2 | 3 |
 |    Non-smokers | 3 | 0 |
Blood | Â | (n = 8) | (n = 9) |
 | Age (years) | 59.86 ± 7.15 | 64.63 ± 4.44 |
 | Sex (M:F) | 5:3 | 6:3 |
 | FEV1 (L) | 3.14 ± 0.63 | 1.21 ± 0.570 |
 | FEV1/FVC | 0.79 ± 0.03 | 0.59 ± 0.25 |
 | GOLD Stage (I/II/III/IV) | 0/0/0/0 | 0/4/4/0 |
 | Smoking History |  |  |
 |    Pack Years | 13.59 ± 24.33 | 62.06 ± 29.67 |
 |    Current smokers | 0 | 1 |
 |    Ex-smokers | 4 | 8 |
 |    Non-smokers | 4 | 0 |