Table 1.
Distributions of women’s age and subjectively rated breast density (BIRADS), and family history of breast cancer in the two groups of high and low-risk cases.
| Risk Factor | Category | High-Risk Cases | Low-Risk Cases |
|---|---|---|---|
| Total Cases | 402 | 642 | |
| Age (years old) | < 45 | 29 (7%) | 169 (26%) |
| 45 – 55 | 93 (23%) | 251 (39%) | |
| 55 – 65 | 148 (37%) | 146 (23%) | |
| > 65 | 132 (33%) | 76 (12%) | |
| Mean ± SD | 60.88±11.10 | 52.48±10.52 | |
| Median | 60 | 50 | |
| Density BIRADS | Almost all fatty tissue | 22 (5%) | 40 (6%) |
| Scattered fibroglandular densities | 153 (38%) | 248 (39%) | |
| Heterogeneously dense | 217 (54%) | 328 (51%) | |
| Extremely dense | 10 (2%) | 26 (4%) | |
| Family History | No family history was known | 149 (37%) | 285 (44%) |
| Cancers in the 1st-degree relatives | 48 (12%) | 50 (9%) | |
| Cancers in the 2nd-degree relatives | 59 (15%) | 83 (13%) | |
| Cancers in the 3rd-degree relatives | 3 (1%) | 22 (3%) | |
| other | 143 (36%) | 202 (31%) |