Serum IL-6 was higher in concentration in CAD (8.5 ± 0.3), T2DM (8.3 ± 0.6) and CAD+T2DM (9.5 ± 0.4) than in the controls (5.3 ± 0.2; p < 0.001; Fig 2B). Here, IL6 is linked to coronary artery disorder.