Parameters
COPD
Non-
COPD
Age
66 ± 2.77
65 ± 3.39
GENDER male/female
65%/35%
52.5%/47.5%
Smoking/Non-Smoking
67.5%/32.5%
75%/25%
Alcohol/Non-alcoholic
74%/26%
83%/17%
Table 1:
Numerical data are expressed as mean value with standard deviation; frequencies as number and percentage of study subjects with certain variable.