Table 1. Summary of the characteristics of the boys and girls at the baseline (n = 48).
| Boys (n = 24) | Girls (n = 24) | P-value | |
|---|---|---|---|
| Mean (SD) | Mean (SD) | ||
| Numerical data | |||
| Age (years) | 12.0 (1.6) | 12.1 (1.6) | 1.000 |
| Body mass (kg) | 45.7 (12.0) | 44.6 (14.7) | 0.331 |
| Height (cm) | 154.7 (12.1) | 149.5 (10.2) | 0.118 |
| PHV (years) | -1.2 (1.3) | 0.9 (1.4) | 0.007 |
| APHV (years) | 13.2 (0.4) | 12.0 (0.5) | < 0.001 |
| LST (kg) | 34.7 (8.3) | 28.6 (5.9) | 0.001 |
| LST gains (kg) | 3.9 (2.2) | 2.2 (1.3) | 0.001 |
| Categorical data | n (%) | n (%) | |
| Sports participation, n* | |||
| Control, n | 9 (50) | 9 (50) | |
| Impact sports, n | 15 (50) | 15 (50) | |
*Sports participation values refer to sample size per group. SD = standard deviation; PHV = peak height velocity; APHV = age peak height velocity; LST = lean soft tissue.