CRP and acute kidney injury: After controlling for other confounders, including age >75 years, creatinine clearance <60 mL/min, emergency PCI, intra-aortic balloon pump, male, weight>60kg, smoke, C-reactive protein (CRP)>3mmol/l and hydration volume ≤960 mL, multivariate logistic regression results revealed that significant Δcystatin C (≥0.3 mg/dL or ≥10%) was not associated with CI-AKI (OR=0.88, 95%CI, 0.32-2.41, P=0.798), so did Δcystatin C absolute increase ≥0.5 mg/L or relative increase≥25% (OR=2.15, 95%CI, 0.68∼6.81, P=0.195) (Table 4).