Figure 4

NT-proBNP ROC curve. An optimal sensitivity and specificity of respectively 58% and 58% was reached with a baseline NT-proBNP cut-off value of 834 ng/l. Corresponding positive and negative predictive values were 54% and 62%, respectively. When considering maximal specificity, a cut-off of 20101 ng/l yielded a specificity of 99% and a sensitivity of 10%. PPV and NPV were 92% and 57%, respectively. AUC 0.63 (95%CI 0.56 - 0.70; P < 0.0001).