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(A) Scatter plot of plasma NT-proBNP concentration versus raw Ross scores in 71 SV patients. Log2 transformation of NT-proBNP failed to reveal a linear relationship with raw Ross score. (B) False positives (1-Specificity) were plotted against true positives (Sensitivity) for all patients. The area under the curve (c-statistic) was 0.63, which was not significant.
