Table 1.

General characteristics of the enrolled subjects.

	Controls	COPD
N	15	51
Gender	All male	All male
Age (years)*	61.2 ± 3.45	66.96 ± 1.58
FEV1% predicted*	89.51 ± 1.90	55.05 ± 2.23**
BMI (Kg/m2)*	23.5 ± 0.79	22.93 ± 0.7
Smoking status (N)
Current smokers	6	14
Ex-smokers	7	33
Never smokers	2	4

Notes: BMI= Body mass index, FEV₁%= forced expiratory volume in one second predicted; N = number; **P < 0.01 compared to the healthy subjects. *Data are shown as Mean ± SEM.