Fig. 2

Median age at breast onset derived from unadjusted Weibull models, by pubertal assessment method in the LEGACY Girls Study (n = 200). The median ages in years (IQR) were 9.9 (9.1–10.5) using Pubertal Development Scale (PDS), 10.8 (9.7–11.8) using Sexual Maturation Scale (SMS), and 10.1 (9.0–11.1) using clinical Tanner stage (TS)