Table 5.
The association of BI-RADS score with a malignant breast cancer diagnosis using logistic regression (n=1215). Percentages of malignant breast cancer were calculated from the BIRADS classification group in each row.
| BI-RADS classification | n (% of total population) | Confirmed malignant breast cancer n (%)* |
|---|---|---|
| R1 | 661 (54.4) | 0 |
| R2 | 281 (23.1) | 0 |
| R3 | 113 (9.3) | 2 (1.8) |
| R4 | 16 (1.3) | 4 (25.0) |
| R5 | 11 (0.9) | 10 (90.9) |
| R0 | 116 (9.6) | 0 |
*
P<.0001 using Fisher exact test. Note: 17 subjects did not have initial screening mammogram due to either young age, fear of procedure or inabilitity to schedule screening test.