Table 3.

Percentage of CD4⁺ and CD8⁺ T lymphocytes in blood and BAL samples.

	Never smokers (n = 7)	Smokers with normal lung function (n = 16)	COPD (n = 14)
CD4+ (%)
Blood	71 ± 3·7	72 ± 2·2	64 ± 3·6
BAL	62 ± 5·4	59 ± 3·3	51 ± 3·7
CD8+ (%)
Blood	28 ± 3·7	27 ± 2·1	34 ± 3·6
BAL	36 ± 5·3	38 ± 3·2	45 ± 3·8

COPD: chronic obstructive pulmonary disease.