Figure 1

(a) CRP levels in sputum from non-smokers, n = 7 (NS), healthy smokers, n = 9 (HS) and in COPD subjects, n = 12. (b) Log₁₀ IL-6 levels (pg/ml) in sputum from non-smokers, n = 5 (NS), healthy smokers, n = 5 (HS) and in COPD subjects, n = 12 (c) IL-8 levels (pg/ml) in sputum from non-smokers, n = 5 (NS), healthy smokers, n = 5 (HS) and in COPD subjects, n = 12 (d) Log₁₀ GM-CSF levels (pg/ml) in sputum from non-smokers, n = 5 (NS), healthy smokers, n = 5 (HS) and in COPD subjects, n = 12. Data are expressed as mean (SEM). p values shown is from Tukey's multiple comparison post-hoc analysis following one-way ANOVA.