LCN2 and acute kidney injury: Persistent AKI increased the risk of acute kidney disease (hazard ratios [HR]: 2.59 [1.55, 4.34]), which was associated with kidney function non-recovery 90 days after AKI (HR 7.73 [1.01, 59.03]).<h4>Conclusions</h4>Urinary NGAL, TIMP-2, IGFBP-7 and CCL14 demonstrated promising performance of predicting kidney function non-recovery within 7 days of AKI onset.