Table 1.
Median agea at Entry into tanner stage ≥2 of breast and pubic hair development and at menarche, overall and by initiation pathway.
| Breast | Pubic Hair | Menarche | ||||
|---|---|---|---|---|---|---|
| Group (n)b | Age (95% CI) | Quartiles | Age (95% CI) | Quartiles | Age (95% CI) | Quartiles |
| All girls (3938) | 10.19 (10.14, 10.24) | 9.16–11.22 | 10.95 (10.90, 11.00) | 9.99–11.91 | 12.87 (10.82, 12.91) | 12.08–13.65 |
| Synchronous (1631) | 10.65 (10.58, 10.72) | 9.81–11.49 | 10.65 (10.58, 10.72) | 9.81–11.49 | 12.84 (12.78, 12.91) | 12.06–13.63 |
| Thelarche (1482) | 9.43 (9.35, 9.51) | 8.42–10.44 | 11.63 (11.57, 11.70) | 10.86–12.40 | 12.78 (12.71, 12.85) | 12.00–13.57 |
| Pubarche (408) | 11.31 (11.19, 11.44) | 10.52–12.10 | 9.44 (9.28, 9.59) | 8.42–10.46 | 13.13 (13.00, 13.26) | 12.34–13.92 |
aNormal distribution specified.
bGirls with unknown initiation pathway (n = 417) were randomly allocated to the initiation pathway groups (proportionate to the distribution among girls with known pathway) and included in the survival models for age at entry into breast and pubic hair stage 2.