Table 1

Mean (SE) characteristics of study subjects

Smokers with COPD (n = 8)Smokers with normal lung function (n = 10)Non-smokers (n = 8)
*p<0.05 v smokers with normal lung function and non-smokers. †p<0.0001 between groups.
M:F8:010:02:6
Age (years)69 (3)65 (2)64 (5)
Smoking history (pack years)55 (7)46 (8)
FEV1 (% predicted)†66 (3)*102 (3)107 (6)
FEV1/FVC (%)†64 (2)*79 (2)80 (1)
Pao2 (kPa)10.5 (0.3)11.7 (0.4)11.7 (0.9)
Paco2 (kPa)5.5 (0.1)5.0 (0.1)5.1 (0.1)