LCN2 and acute kidney injury: Results showed that in the AKI group, urinary KIM-1 levels (r = −0.713, p < 0.01), urinary NGAL levels (r = −0.744, p < 0.01), and serum Cys C levels (r = −0.860, p < 0.01) were negatively correlated with GFR (Fig. 3).