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Table 4 Diagnostic accuracy of sonomammography tested in the whole study cohort versus the result of biopsy or follow-up as the gold standard for lesion classification

From: Contrast-enhanced spectral mammography: successful initial clinical institute experience

Lesion classification by SMG Final diagnosis Total
Malignant Benign
Probably malignant (BI-RADS 4–6) 75 18 93
Probably benign (BI-RADS 1–3) 11 19 30
Total 86 37 123
Statistic Value Lower bound (95%) Upper bound (95%)
Correct classification 76% 69% 84%
Misclassification 24% 16% 31%
Sensitivity 87% 78% 93%
Specificity 51% 36% 67%
False positive rate 49% 33% 64%
False negative rate 13% 6% 20%
Prevalence 70% 62% 78%
Positive predictive value (PPV) 81% 73% 89%
Negative predictive value (NPV) 63% 46% 81%
Positive likelihood ratio (LR+) 1.79 1.27 2.52
Negative likelihood ratio (LR−) 0.25 0.13 0.47
Relative risk 2.20 1.38 3.51
Odds ratio 7.20 2.96 17.50
  1. Data in cross-tables are counts