Table 1 Distribution of demographics in women with a history of benign breast disease and no history of benign breast disease, EDMD
From: Benign breast disease and changes in mammographic breast density
Characteristic | BBD (n = 119) N (%) | No BBD (n = 557) N (%) |
|---|---|---|
Age at interview, median (range) | 44.3 (40.2–47.7) | 44.2 (39.2–49.2) |
Age at BBD diagnosis, median (range) | 32.0 (12.0–44.0) | N/A |
Time between BBD diagnosis and first mammogram in years, median (range) | 9.4 (1.1–27.6) | N/A |
Age at first mammogram, median (range) | 41.3 (30.1–46.7) | 40.8 (24.7–47.6) |
Time between first and last mammogram in years, median (range) | 3.3 (1.0–16.6) | 3.7 (1.0–19.8) |
Race/ethnicity | ||
Non-Hispanic White | 92 (77.3%) | 435 (78.4%) |
Non-Hispanic African American | 12 (10.1%) | 72 (13.0%) |
Hispanic | 9 (7.6%) | 28 (5.1%) |
Other | 6 (5.0%) | 20 (3.6%) |
Family history of breast cancer | ||
Yes | 18 (15.1%) | 70 (12.6%) |
No | 101 (84.9%) | 487 (87.4%) |
Menopausal status at interview | ||
Premenopausal | 81 (69.2%) | 379 (69.0%) |
Perimenopausal | 21 (18.0%) | 96 (17.5%) |
Postmenopausal | 15 (12.8%) | 74 (13.5%) |
BMI in 30s (mean ± std) | 23.5 ± 5.3 | 25.0 ± 5.6 |
Age at menarche (mean ± std) | 13.0 ± 1.7 | 12.7 ± 1.6 |
Parity | ||
Nulliparous | 37 (31.6%) | 110 (19.8%) |
Parous | 80 (68.4%) | 446 (80.2%) |
Among parous women only: | ||
Age at first birth (mean ± std) | 26.9 ± 5.3 | 27.6 ± 5.7 |
Age at last birth (mean ± std) | 31.0 ± 5.7 | 31.9 ± 5.5 |
Breastfeeding | ||
Never | 16 (20.0%) | 101 (22.7%) |
Ever | 64 (80.0%) | 344 (77.3%) |