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 | Â | |
|---|---|---|---|
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 |