Figure 9

Single criteria screening effectivity. (upper left) Sensitivity and specificity for the relative duration of the systolic murmur to differentiate between pathological and physiogical murmurs. (upper right) ROC for the relative duration of the systolic murmur. Area under curve is 0.86. (lower left) Sensitivity and specificity for the high frequency limit to differentiate between pathological and physiological murmurs. (lower right) ROC for the high frequency limit. Area under curve is 0.92.