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ROC curves for bNGAL. Panel A: bNGAL at 4 h did not discriminate between patients without renal disease following surgery compared to those with AKI (AUC (95% CI) = 0.71 (0.49 - 0.94); P = 0.102). Panel B: bNGAL performed at 18 h shows that it is possible to separate the two patient groups (AUC (95% CI) = 0.81(0.63 - 0.99); P = 0.028). bNGAL - whole blood neutrophil gelatinase-associated lipocalin. AKI - acute kidney injury. AUC - area under curve.
