Figure 4From: Urine neutrophil gelatinase-associated lipocalin is an early marker of acute kidney injury in critically ill children: a prospective cohort studyReceiver operating characteristic curve for uNGAL. Shown are receiver operating characteristic curve for uNGAL on days -2 or -1 used to predict development of (a) acute kidney injury (AKI) within 48 hours (area under the receiver operating characteristic curve [AUC] 0.78) and (b) persistent AKI within 48 hours of first urine collection (AUC 0.80).Back to article page