B2M and Abnormal renal physiology: AUCs of ROC curves for NGAL/FuCr, CysC/FuCr and B2M/FuCr as predictors of renal dysfunction or death within 30 days after birth were: 0.793 (95% CI: 0.614-0.972, <i>p</i> = 0.001), 0.857 (95% CI: 0.7-1.0, <i>p</i> < 0.0001), 0.764 (95% CI: 0.562-0.966, <i>p</i> = 0.01), respectively.