Covariate | Breast Tanner stage | Demographics | |
---|---|---|---|
Age at visit, years | B2 | n | 256 |
Median | 10.1 | ||
25th–75th percentiles | 9.4–10.8 | ||
B4 | n | 358 | |
Median | 11.1 | ||
25th–75th percentiles | 10.6–11.8 | ||
Fibroglandular volume (% DV/BV) | FGV | n | 345 |
Median | 76.8 | ||
25th–75th percentiles | 58.7–98.4 | ||
BV | n | 345 | |
Median | 200.5 | ||
25th–75th percentiles | 144.7–278.7 | ||
%FGV | n | 345 | |
Median | 37.9 | ||
25th–75th percentiles | 27.2–53.4 | ||
Age at menarche, years | n | 379 | |
Median | 11.9 | ||
25th–75th percentiles | 11.2–12.4 | ||
Fat percentage at Tanner 4 | n | 357 | |
Median | 26.0 | ||
25th–75th percentiles | 22.5–29.8 | ||
Maternal education | Completed secondary | n | 328 |
% | 76.5 | ||
Completed post-secondary | n | 101 | |
% | 23.5 | ||
ER-α methylation | B2 | n | 256 |
Median | 6.0 | ||
25th–75th percentiles | 4.0–8.8 | ||
B4 | n | 338 | |
Median | 7.0 | ||
25th–75th percentiles | 4.3–9.4 |