- Validity of Rater 1 and Rater 2 decision according to pathology of the lesion.
| BIRADS | Pathology | P-value* | |
|---|---|---|---|
| Benign | Malignant | ||
| Rater 1 | |||
| 4A (n=135) | 133 (98.5) | 2 (1.5) | <0.001 |
| 4B (n=68) | 63 (92.6) | 5 (7.4) | |
| 4C (n=44) | 10 (22.7) | 34 (77.3) | |
| Rater 2 | |||
| 4A (n=151) | 149 (98.7) | 2 (1.3) | <0.001 |
| 4B (n=48) | 44 (91.7) | 4 (8.3) | |
| 4C (n=48) | 13 (27.1) | 35 (72.9) | |
Values are presented as numbers and percentages (%).
BIRADS: breast-imaging reporting and data system
↵* Chi-square test for proportions was used to estimate the p-values.