Table 5. Screening Frequency and Resultant BI-RADS Classification of Carcinoma Breast Diagnosis in Women Undergoing Annual, Biennial, and Less-Frequent-Than-Biennial Screenings.
| BI-RADS | Screening frequency |
Total | ||
|---|---|---|---|---|
| Annual | Biennial | Less frequent than biennial | ||
| No malignancy | 741 (45.0%) | 87 (23.3%) | 29 (27.1%) | 857 (40.3%) |
| Probably benign | 196 (11.9%) | 59 (15.8%) | 19 (17.8%) | 274 (12.9%) |
| Suspicion of malignancy | 404 (24.5%) | 138 (37.0%) | 33 (30.8%) | 575 (27.0%) |
| Almost certain malignant | 259 (15.7%) | 70 (18.8%) | 23 (21.5%) | 352 (16.5%) |
| Carcinoma | 47 (2.9%) | 19 (5.1%) | 3 (2.8%) | 69 (3.2%) |
| Total | 1,647 (100.0%) | 373 (100.0%) | 107 (100.0%) | 2,127 (100.0%) |
χ2 = 72.2, df = 8, P < 0.001, Cramer’s V = 0.13. BI-RADS: Breast Imaging Reporting and Data System.