LCN2 and acute kidney injury: Urinary KIM-1, urinary NGAL, serum Cys C, and the combined detection factor serving as a screening index for AKI secondary to decompensated cirrhosis had sensitivities of 63.4, 68.3, 80.2 and 89.1%, respectively and specificities of 81.6, 72.1, 74.9, and 95.8%, respectively.