IL6 and diabetes mellitus: A multivariable analysis showed that high IL-6 levels were independently associated with an increased risk of AVF dysfunction in both patients with and without diabetes (adjusted HR = 4.81, 95% CI = 1.02–22.64, p = 0.047 and HR = 7.53, 95% CI = 1.49–38.15, p = 0.015, respectively).