IGFBP7 and acute kidney injury: The area under the curve (AUC) of the U-AKIpredTM (combined with A1MG, L-FABP and IGFBP7) as a predictor of AKI within 12 h, was 0.802 (95% CI: 0.771–0.833, p < 0.001) in the training set and 0.844 (95% CI: 0.792–0.896, p < 0.001) in validation cohort.