The urinary peptide score was also significantly associated with severe AKI stage 2 or 3, similarly to the [IGFBP7]*[TIMP2] product (AUC 0.74 [0.68–0.80] vs. 0.73 [0.67–0.79], respectively, p = 0.6), and outperformed NGAL (0.67 [0.61–0.74], p = 0.04). This evidence concerns the gene TIMP2 and acute kidney injury.