Figure 4

Memory B cells in peripheral blood. A) Percentages of memory B cells and class switched memory B cells (D) in peripheral blood of current smokers (closed symbols) and non smokers (open symbols). In B), C) and E), F) the same results are depicted, but divided into subgroups based on the current smoking status and COPD versus healthy controls. In A) and D) the results of the multiple linear regression analysis corrected for having COPD are depicted. In C) and F) the results of the multiple linear regression analysis corrected for smoking are depicted. In B) and E) the results of the Mann Whitney U tests are depicted. * indicates that p < 0.05