Variable | Controls | Cases | P | |
---|---|---|---|---|
(n = 311) | (n = 258) | |||
Age, years | 63 ± 9 | 62 ± 8 | NS | |
Sex(Male/Female) | 277/34 | 230/28 | NS | |
Smoking history | 0–20 pack years | 69 | 54 | NS |
20 pack years | 242 | 204 | NS | |
FEV1 | 1.81 ± 0.96 | 0.92 ± 0.45 | < 0.05 | |
FEV1 percentage of predicted, % | 91.5 ± 4.8 | 44.1 ± 0.51 | < 0.05 | |
FEV1/FVC, % | 76.2 ± 5.7 | 44.8 ± 9.4 | < 0.05 |