The AUC values and 95% confidence intervals (CIs) for predicting AKI using [TIMP-2]⋅[IGFBP7], L-FABP, and NGAL were 0.804 (95% CI, 0.728–0.880), 0.688 (95% CI, 0.594–0.782), and 0.726 (95% CI, 0.639–0.813), respectively. The gene discussed is TIMP2; the disease is acute kidney injury.