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 |