CXCL8 and acute kidney injury: Multiple logistic regression analysis adjusted for patients’ age proved that the best independent predictors of CSA-AKI are: intraoperative diuresis (OR = 0.047, CI: 0.005–0.451 over 1000 mL, p = 0.006), IL-8 6 h after weaning from CPB (OR = 11.991, CI: 1.549–92.830 over 1 ng/mL, p = 0.014) and NGAL 6 h after weaning from CPB (OR = 3.434, CI: 1.180–9.991 over 1 ng/mL, p = 0.020).