IL6 and atrial fibrillation: Of note, prior work in MESA has found that GlycA is only modestly to moderately correlated with other markers of inflammation [with Pearson correlation coefficient for GlycA with d-dimer (0.09), IL-6 (0.29), hsCRP (0.47), and fibrinogen (0.49) [18], and thus we had anticipated associations with AF independent of other inflammatory markers.