GOLD Status | II Moderate | III Severe | IV Very Severe | P-value |
---|---|---|---|---|
Male (%) | 74.7 | 67.5 | 67.2 | 0.0608 |
Age (yr) | 66.1 ± 8.0 | 66.7 ± 8.4 | 64.3 ± 8.1 | 0.0016 |
Pack Years | 49.2 ± 21.1 | 48.5 ± 22.3 | 48.4 ± 26.0 | 0.9105 |
Predicted FEV 1 (%) | 60.2 ± 5.9 | 40.0 ± 5.8 | 23.4 ± 4.3 | < 0.0001 |
FEV 1 /FVC (%) | 57.1 ± 7.8 | 45.9 ± 9.9 | 36.2 ± 9.4 | < 0.0001 |
N | 336 | 406 | 235 | Â |