Table 2. Correlations between different types of dendritic cells in the study groups.

	COPD(n = 43)	Non-COPD, current smokers(n = 11)	Non-COPD, former smokers(n = 13)	Non-COPD, never smokers(n = 8)
BDCA1+mDCs–BDCA3+mDCs	r = 0.559p < 0.001	r = 0.745p = 0.008	r = 0.832p = 0.001	r = 0.503p = NS
BDCA1+mDCs–pDCs	r = 0.417p = 0.005	r = 0.391p = NS	r = 0.286p = NS	r = 0.036p = NS
BDCA3+mDCs–pDCs	r = 0.386p = 0.013	r = 0.318p = NS	r = 0.538p = NS	r = 0.214p = NS

Correlations were calculated using the Spearman’s rank correlation coefficient.