Label | Baseline | Follow-up 1 | Follow-up 2 | Two-yr Intervention Effect | ||||
---|---|---|---|---|---|---|---|---|
C | I | C | I | C | I | EffectA | SE | |
Demographics | ||||||||
Girls' race (% white) | 90 | 90 | -- | -- | -- | -- | -- | -- |
Family income (% > $90 k) | 51 | 46 | -- | -- | -- | -- | -- | -- |
Parent's education (% = college degree) | 50 | 59 | -- | -- | -- | -- | -- | -- |
Girls' age (years) | 10.5 | 10.4 | 11.5 | 11.4 | 12.4 | 12.3 | 0.04 | 0.02 |
Physical Development | ||||||||
Breast Stage 1 (%) | 37 | 47 | 30 | 40 | 1 | 1 | -- | -- |
Breast Stage 2 (%) | 55 | 51 | 53 | 55 | 24 | 23 | -- | -- |
Breast Stage 3 (%) | 7 | 2 | 17 | 5 | 44 | 53 | -- | -- |
Breast Stage 4 (%) | 0 | 0 | 0 | 0 | 21 | 16 | -- | -- |
Breast Stage 5 (%) | 0 | 0 | 0 | 0 | 10 | 7 | -- | -- |
Pubic Hair Stage 1 (%) | 62 | 73 | 23 | 34 | 5 | 7 | -- | -- |
Pubic Hair Stage 2 (%) | 24 | 21 | 33 | 33 | 25 | 23 | -- | -- |
Pubic Hair Stage 3 (%) | 13 | 6 | 28 | 25 | 29 | 38 | -- | -- |
Pubic Hair Stage 4 (%) | 2 | 0 | 15 | 9 | 38 | 31 | -- | -- |
Pubic Hair Stage 5 (%) | 0 | 0 | 1 | 0 | 5 | 1 | -- | -- |
Menarcheal (% yes) | 2 | 0 | 14 | 6 | 34 | 35 | -- | -- |
Body Size and Composition | ||||||||
Height (cm) | 143.5 | 142.7 | 149.7 | 149.2 | 155.6 | 155.5 | 0.77 | 0.46 |
Weight (kg) | 40.5 | 39.5 | 45.1 | 44.2 | 49.9 | 49.8 | 0.90 | 0.75 |
BMI (kg/m2) | 19.5 | 19.3 | 20.0 | 19.8 | 20.5 | 20.5 | 0.28 | 0.26 |
Fat Mass (%) | 26.1 | 25.4 | 25.6 | 25.3 | 24.7 | 24.7 | 0.62 | 0.57 |
Lean Mass (%) | 71.2 | 71.8 | 71.5 | 71.9 | 72.2 | 72.3 | -0.58 | 0.55 |