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ROC curves for sCreatinine. Panel A: sCreatinine at 4 h did not discriminate between patients without renal disease following surgery compared to those with AKI (AUC (95% CI) = 0.62 (0.36 - 0.89); P = 0.348). Panel B: sCreatinine performed at 18 h shows that it is possible to separate the two patient groups (AUC (95% CI) = 0.94 (0.85 - 1.04); P = 0.001). sCreatinine - serum creatinine. AKI - acute kidney injury. AUC - area under curve.
