Summary statistics for 22 901 participants with valid data
| Variable | n | Mean | SD |
|---|---|---|---|
| SDS, standard deviation score. | |||
| Men (%) | 22 901 | 49.6 | — |
| Age (years) | 22 901 | 13.1 | 5.2 |
| Height (cm) | 22 676 | 148.9 | 21.3 |
| Weight (kg) | 22 485 | 46.4 | 19.9 |
| Height SDS (British 1990) | 22 676 | −0.03 | 1.08 |
| Weight SDS (British 1990) | 22 485 | 0.27 | 1.14 |
| Body mass index SDS (British 1990) | 22 425 | 0.36 | 1.11 |