From: Glutathione-S-transferases in lung and sputum specimens, effects of smoking and COPD severity
 | Non-smoker N = 7 | Smoker N = 7 | COPD N = 16 | p-value |
---|---|---|---|---|
Age, years | 63 (13) | 59 (4) | 62 (10) | 0.754 |
Sex M:F | 4:3 | 5:2 | 12:4 | 0.688 |
Pack-years | 0 | 36 (16)* | 34 (17)§ | 0.000 |
FEV1 %predicted | 88 (18) | 88 (13) | 55 (31)*# | 0.005 |
FEV1/FVC % | 83 (9) | 83 (10) | 57 (20)*# | 0.000 |
MEF50 %pred | 88 (35) | 84 (61) | 37 (22) | 0.066 |
DCO %pred | 95 (20) | 82 (10) | 52 (22)§ | 0.003 |
DCO/VA %pred | 100 (18) | 89 (9) | 62 (24) § | 0.006 |