LCN2 and acute kidney injury: At an optimalcutpoint of 244 μg/g, NGAL discriminated ATN from non-ATN kidney injurywith a C statistic of 0.762 (95% CI 0.682, 0.842), 71% sensitivity, 76%specificity, 56% positive predictive value, and 86% negative predictive value.As reference, patients hospitalized with decompensated cirrhosis without AKI hadthe lowest urinary NGAL levels (19 [0, 58] μg/g).