Fig. 2.

ROC curves for the ability of urinary IGFBP-7, serum and urinary cystatin C, and PRISM III score to predict severe AKI in critically ill children. AKI network stages 2 and 3 were defined as severe AKI. AKI, acute kidney injury; AUC, the area under the ROC curve; PRISM III, pediatric risk of mortality III; ROC, receiver operating characteristic. The P value for comparison between the AUCs of urinary IGFBP-7 and serum cystatin C was 0.103 and for comparison between the AUCs of urinary IGFBP-7 and urinary cystatin C was 0.225