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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.