LCN2 and acute kidney injury: Figure 5 shows the survival curves for patients with and without AKIcrea48h separated by baseline P-PENK (panel A) and baseline P-NGAL (panel B) higher (subclinical AKI) or lower than the optimal cut-off for AKI prediction (84.8 pmol/mL for P-PENK0h and 104 ng/mL for P-NGAL0h).