LCN2 and Abnormal renal physiology: AUCs of ROC curves for NGAL/FuCr, CysC/FuCr and B2M/FuCr as predictors of renal dysfunction on day 30 after birth were: 0.756 (95% CI: 0.535-0.976, <i>p</i> = 0.02), 0.833 (95% CI: 0.649-1.0, <i>p</i> = 0.0004), 0.722 (95% CI: 0.482-0.963, <i>p</i> = 0.07), respectively.