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Table 6 Diagnostic accuracy of SMG in tested patients with ACR grade C/D 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  
Malignant Benign Total
Probably malignant (BIRADS 4–6) 42 11 53
Probably benign (BIRADS 1–3) 8 13 21
Total 50 24 74
Statistic Value Lower bound (95%) Upper bound (95%)
Correct classification 74% 64% 84%
Misclassification 26% 16% 36%
Sensitivity 84% 71% 92%
Specificity 54% 35% 72%
False positive rate 46% 27% 64%
False negative rate 16% 6% 26%
Prevalence 68% 57% 78%
Positive predictive value (PPV) 79% 68% 90%
Negative predictive value (NPV) 62% 41% 83%
Positive likelihood ratio (LR+) 1.83 1.17 2.88
Negative likelihood ratio (LR−) 0.30 0.14 0.62
Relative risk 2.08 1.21 3.57
Odds ratio 6.20 2.11 18.22
  1. Data in cross-tables are counts