| Control | COPD | P-value |
---|---|---|---|
Male (%) | 63.9 | 70.0 | 0.0049 |
Age (yr) | 60.8 ± 8.9 | 65.9 ± 8.2 | <0.0001 |
Smoking Pack Years | 38.6 ± 17.3 | 48.8 ± 22.9 | <0.0001 |
Predicted FEV 1 (%) | 95.3 ± 10.9 | 43.1 ± 15.1 | <0.0001 |
FEV 1 /FVC (%) | 77.8 ± 4.9 | 47.5 ± 12.1 | <0.0001 |
N | 900 | 1002 | Â |