From: Dietary intake and breast density in high-risk women: a cross-sectional study
Characteristic | Entirely fatty (n = 20) | Heterogeneously dense (n = 44) | Scattered fibroglandular tissue (n = 54) | Extremely dense (n = 39) | Age-adjusted odds ratio (95% confidence interval)a |
---|---|---|---|---|---|
Age (years) | 54.1 ± 1.0 | 53.9 ± 0.9 | 48.7 ± 0.6 | 47.4 ± 0.7 | 0.4 (0.3–0.6)b |
College graduate (%)c | 55 | 72 | 72 | 84 | 1.5 (0.8–3.0) |
Body mass index (kg/m2) | 33.3 ± 7.1 | 28.3 ± 6.1 | 24.8 ± 4.4 | 23.8 ± 3.0 | 0.8 (0.8–0.9) |
Age at menarche (years) | 12.4 ± 1.3 | 12.3 ± 1.3 | 12.5 ± 1.4 | 13.1 ± 1.8 | 1.3 (1.1–1.6) |
Number of live birthsc | 3.1 ± 1.4 | 2.5 ± 1.6 | 2.6 ± 0.9 | 1.9 ± 1.0 | 0.8 (0.6–1.0) |
Age at first birth (years)c | 23.7 ± 5.9 | 25.6 ± 4.1 | 27.4 ± 5.8 | 29.5 ± 5.1 | 1.1 (1.0–1.2) |
Ever breastfedc | 30 | 72 | 63 | 75 | 1.0 (0.4–2.7) |
Postmenopausal | 65 | 66 | 33 | 28 | 0.5 (0.3–1.2) |
Ever used hormonal contraceptives | 45 | 41 | 63 | 37 | 0.8 (0.5–1.4) |
Ever used hormone replacement medicined | 85 | 45 | 56 | 36 | 0.4 (0.2–1.0) |
Weekly physical activity (hours) | 2.9 ± 2.9 | 3.6 ± 3.0 | 3.5 ± 2.9 | 2.9 ± 2.5 | 1.0 (0.8–1.1) |
Smoking status | |||||
   ∘ Never smoked | 50 | 49 | 57 | 61 | 1.0 |
   ∘ Former smoker | 45 | 49 | 39 | 26 | 0.6 (0.3–1.1) |
   ∘ Current smoker | 5 | 2 | 4 | 13 | 2.0 (0.5–7.6) |
Family history of breast cancer | |||||
   ∘ Negative or sporadic | 15 | 30 | 22 | 10 | 1.0 |
   ∘ Familial | 35 | 45 | 33 | 33 | 1.3 (0.6–2.9) |
   ∘ Hereditary | 50 | 25 | 44 | 56 | 1.8 (0.8–4.0) |