Table 6.
Diagnostic indicators of imaging modalities
| Mammography | A-MRIa | P value** | |
|---|---|---|---|
| False negative | 6 | 0 | |
| True negative | 183 | 78 | |
| False positive | 8 | 21 | |
| True positive | 1 | 5 | |
| Recall rate | 9/198 (4.5%) | 25/104 (25%) | < 0.00001 |
| Biopsy rate | 6/198 (3.0%) | 19/104 (18.3%) | < 0.00001 |
| CDR | 1/198 (0.5%) | 5/104 (4.8%) | 0.0109 |
| PPV2 (recommended) | 1/6 (16.7%) | 5/20 (25%) | 0.59 |
| PPV3 (performed) | 1/6 (16.7%) | 5/19 (26.3%) | 0.557 |
| Sensitivity (%, CI) | 1/7 (14.2%, 0.36–57.8) | 5/5 (100%) | 0.004 |
| Specificity (%, CI) | 183/191 (95.8%, 91.9–98) | 78/99 (78.8%) | 0.00001 |
CI 95% confidence intervals, A-MRI Abbreviated breast MRI, CDR Cancer detection rate (per 1000 women), PPV2 Positive predictive value for biopsies recommended, PPV3 Positive predictive value for biopsies performed, CI Confidence interval
aincluding intra-mammary findings only,
**excluding extra-mammary findings, chi-square test for comparison between groups