Figure 4

Receiver-operating characteristic (ROC) curves of BNP and NT-proBNP according to chronic kidney disease (CKD) staging. (A) For CKD stage 3 the area under the curve (AUC) for BNP and NT-proBNP was 0.66 and 0.88 respectively. (B) For CKD stage 4 the area under the curve (AUC) for BNP and NT-proBNP was 0.74 and 0.85 respectively. (C) For CKD stage 5 the area under the curve (AUC) for BNP and NT-proBNP was 0.77 and 1.00 respectively.