The ROC curve analysis showed that the area under the ROC curve (AUC) of [TIMP-2]•[IGFBP7] for predicting AKI was 0.804 (95% confidence interval [CI], 0.728–0.880); however, the AUCs of L-FABP and NGAL were 0.688 (95% CI, 0.594–0.782) and 0.726 (95% CI, 0.639–0.813), respectively. The gene discussed is LCN2; the disease is acute kidney injury.