Table 3.
Comparison of benign breast disease characteristics between the Detroit, African American cohort and the Mayo Clinic cohort
| Detroit (N, %) | Mayo (N, %) | p value | |
|---|---|---|---|
| Age at Biopsy | |||
| <40 | 304, 21.6% | 1603, 18.3% | <0.01 |
| 40-49 | 497, 35.4% | 2446, 28.0% | <0.01 |
| 50-59 | 321, 22.8% | 2109, 24.1% | 0.30 |
| 60-69 | 173, 12.3% | 1600, 18.3% | <0.01 |
| 70+ | 111, 7.9% | 978, 11.2% | <0.01 |
| Atrophy/Involutiona | |||
| None | 248, 20.6% | 1627, 18.6% | 0.11 |
| Partial | 727, 60.3% | 5197, 59.5% | 0.60 |
| Complete | 230, 19.1% | 1912, 21.9% | 0.03 |
| Overall Impressionb | |||
| Non-Proliferative Disease | 945, 67.8% | 5736, 65.7% | 0.13 |
| Proliferative Disease without Atypia | 405, 29.1% | 2677, 30.6% | 0.24 |
| Proliferative Disease with Atypia | 44, 3.2% | 323, 3.7% | 0.35 |
a
Unknown for 201 Detroit cases,
b
Unknown for 12 Detroit cases