Table 3. WBC counts and leucocyte differentials from study populations.

	Nonsmoker n = 13	COPD n = 16‡	Smoker n = 14
WBC (× 106/ml)	7·7 (5·7; 8·4)	7·8 (7·2; 9·5)	8·0 (7·1; 10·2)
Basophils (%)	0·4 (0·3; 0·5)	0·4 (0·3; 0·7)	0·4 (0·3; 0·5)
Eosinophils (%)	2·0 (0·9; 2·6)	2·2 (1·5; 2·9)	3·1 (2·4; 3·4)*
Neutrophils (%)	55·8 (48·7; 46·4)	65·4 (60·2; 69·1)†	55·1 (49·2; 57·6)
Lymphocytes (%)	35·9 (33·7; 40·7)	25·9 (21·7; 27·7)†	35·1 (30·7; 41·9)
Monocytes (%)	7·1 (6·4; 8·0)	7·5 (6·8; 9·0)	6·6 (5·7; 7·0)

^‡Leucocyte differentials for 15 patients. WBC, white blood cells. Data are given as median (25th; 75th percentile).

^*P < 0·01 versus nonsmoker;

^†P < 0·01 versus nonsmoker and smoker.