Figure 3From: Systemic inflammation in chronic obstructive pulmonary disease: a population-based studySerum concentrations of systemic biomarkers in COPD patients and control subjects. Data are presented as mean adjusted for age, sex, pack-years of smoking and body-mass index (standard error of the mean). A logarithmic transformation was used for CRP and NOx. Abbreviations: CRP = C-reactive protein; TNF = tumor necrosis factor; IL = interleukin; A1AT = alpha-1 antitrypsin; NOx = nitrites/nitrates.Back to article page