Table 3.
Performance of intraoperative staging and MRI.
| Whole Population | No preop. chemotherapy | |||
| MRI | IOUS1 | MRI | IOUS | |
|
| ||||
| Number of patients without FN lesions | 541 | 682 | 195 | 226 |
| Total number of patients | 721 | 721 | 232 | 232 |
| Sensitivity (%) | 75.1 | 94.5 | 84.1 | 97.4 |
| PPV (%) | 79.7 | 93.5 | 83.7 | 97.8 |
| LR− | 0.26 | 0.07 | 0.16 | 0.03 |
|
| ||||
| MRI | IOUS1 | MRI | IOUS | |
|
| ||||
| Number of patients without FP lesions | 692 | 690 | 231 | 228 |
| Total of patients | 721 | 721 | 232 | 232 |
| Specificity (%) | 95.9 | 95.7 | 99.5 | 98.3 |
| NPV (%) | 95.7 | 96.5 | 97.4 | 97.7 |
| LR+ | 17.5 | 21.9 | 84 | 48.5 |
MRI, magnetic resonance imaging; FP, false positive; FN, false negative; PPV, positive predictive value; NPV, negative predictive value. 1IOUS with or without contrast enhancement.