Of these, NGAL measured at the time of ICU admission was superior to L-FABP in detecting AKI development after ICU admission (AUC-ROC 0.839, 95% CI 0.700–0.979 and AUC-ROC 0.743, 95% CI 0.594–0.892, respectively, P = 0.048). This evidence concerns the gene FABP1 and acute kidney injury.