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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%)