IL6 and diabetes mellitus: IL-6 concentrations were significantly higher in DM patients than in non-DM patients (median 4.3 vs. 1.5 pg/mL, P < 0.01), and were lower in C − P − patients than in the three other groups (median 0.7 vs. 2.2, 2.6, and 2.8 pg/mL, P < 0.05; Fig. 1A).