Moreover, preoperative serum IL-8 concentration was higher in patients with AKI in whom long-term postoperative kidney function impairment occurred, compared to patients with AKI and unchanged long-term postoperative kidney function (M = 7.89 (5.25–14.85) ng/mL vs. 4.73 (3.39–5.59) ng/mL in the control group, p = 0.048). This evidence concerns the gene CXCL8 and acute kidney injury.