Table 1.

Characteristics of COPD patients, smokers and non-smoker subjects.

Group	COPD	Smokers	Non smokers
Nb	12	14	14
Sexes (M/F)	11/1	11/3	10/4
Age	59.2 ± 17.1	43.9 ± 4.7	45.5 ± 5.7
Smoking (pack/year)	57 ± 5.9	37.6 ± 5.2	0
FEV1%	51.3 ± 4.1	94.7 ± 1.3	95.3 ± 3.5
PO2	77.1 ± 6.6	ND	ND
BODE	3. 1 ± 0.5	ND	ND
Body mass index	25.6 ± 1.2	ND	ND
VEMS%	56.9 ± 4.6	ND	ND
MRC score	1.5 ± 0.31	ND	ND
6 MWT	410 ± 34.8	ND	ND
Inhaled corticosteroid	4	0	0