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Table 3 Performance results of mean tissue elasticity versus greyscale BI-RADS

From: Quantitative shear wave ultrasound elastography: initial experience in solid breast masses

  Elastography BI-RADS
Positive predictive value (%) 88 (77 to 99) 84 (71 to 97)
Negative predictive value (%) 95 (85 to 100) 82 (66 to 98)
Sensitivity (true positive fraction) (%) 97 (90 to 100) 87 (75 to 99)
Specificity (true negative fraction) (%) 83 (67 to 98) 78 (61 to 95)
Accuracy (%) 91 83
Misclassification rate (%) 9 17
Youden's index 0.79 0.65
Area under curve 0.90 (0.81 to 0.98) 0.83 (0.71 to 0.94)
Area under curve difference 0.07 (-0.02 to 0.16)  
P value (Mann-Whitney U test) 0.129  
  1. Data presented as mean (95% confidence interval). BI-RADS, American College of Radiology Breast Imaging and Reporting Data System.