Fig. 1
From: Pubertal timing and breast cancer risk in the Sister Study cohort
Associations between early thelarche, early menarche, and incident breast cancer in the Sister Study cohort. N = 49,686 women. Early thelarche is defined as < 10 years (vs. ≥10 years), and early menarche is defined as < 12 years (vs. ≥12 years). Estimates are adjusted for attained age, race/ethnicity, and family income level growing up and stratified by birth cohort. p for interaction between early thelarche and early menarche = 0.99. Hazard ratios (HRs) and 95% confidence intervals (CIs) are plotted on the log scale