Table 2.

Characteristics of the Group B subjects.

	Smokers with COPD (SC; n = 9)	Smokers without COPD (S; n = 11)	Non-smokers (NS; n = 5)	p
Age, years	70 ± 6	70 ± 6	62 ± 7	NS
Smoking history, pack-years	41 ± 12	42 ± 16	–	NS
Smoking status, current/ex	4/5	8/3	–	NS
FEV1% pred	54 ± 11*	100 ± 6	101 ± 11	0.001
FEV1/FVC %	55 ± 12*	84 ± 10	86 ± 5	0.001
Total cell counts (106 mL)	3.2 ± 1.8	3.0 ± 1.7	3.1 ± 1.9	NS
Macrophages (%)	96.6 ± 1.4	96.5 ± 1.3	96.4 ± 1.6	NS
Neutrophils (%)	2.0 ± 1.1	1.9 ± 1.2	2.0 ± 1.6	NS
Lymphocytes (%)	1.4 ± 0.7	1.6 ± 0.7	1.6 ± 0.5	NS

* Values are expressed as mean ± SD.

The statistical analysis was performed using one-way ANOVA with Tukey as a post-hoc test.

*Significantly different from smokers without COPD and non-smokers (p < 0.001). NS: non-significant. –, not applicable.