LCN2 and acute kidney injury: IGFBP7 had a good predictive value (AUC 0.75–0.9) for AKI from 0 to 6 h after ICU admission (Table 2, Supplementary Fig. 4), while L-FABP had a good predictive value (AUC 0.75–0.9) for AKI from 0 to 4 h after ICU admission, and NGAL had a good predictive value (AUC 0.75–0.9) for AKI from 0 to 2 h after ICU admission (Table 2, Supplementary Fig. 5, 6).