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Sample characteristics
| Group | Boys(n) | Girls(n) | Age at T1 (y) | Interval (T2 − T1) (m) |
|---|---|---|---|---|
| Vanbeek | 7 | 7 | 10.71 ± 1.44 | 7.28 ± 2.30 |
| Herbst | 4 | 7 | 11.55 ± 0.69 | 10.18 ± 3.06 |
| Twin-Block | 7 | 5 | 11.00 ± 1.04 | 10.16 ± 5.46 |
| MA | 12 | 2 | 12.11 ± 1.16 | 22.84 ± 8.98 |
| Control | 7 | 5 | 10.41 ± 0.90 | 10.25 ± 3.74 |
