Study population by age, sex, and SES
| Mean | SD | Number | % | |
|---|---|---|---|---|
| Children (8–11 years) | 754 | 39.8 | ||
| Age | 9.75 | 0.97 | ||
| Sex | ||||
| Female | 387 | 51.3 | ||
| Male | 367 | 48.7 | ||
| Adolescents (12–18 years) | 1142 | 60.2 | ||
| Age | 14.08 | 1.65 | ||
| Sex | ||||
| Female | 600 | 52.5 | ||
| Male | 537 | 47.0 | ||
| Missing | 5 | 0.5 | ||
| SES | ||||
| Familial wealth (FAS) | ||||
| Low | 268 | 14.1 | ||
| Medium | 855 | 45.2 | ||
| High | 727 | 38.3 | ||
| Missing | 46 | 2.4 | ||
| Parental education | ||||
| Low (pre-primary–lower secondary education) | 332 | 17.5 | ||
| Medium (upper–post-secondary education) | 821 | 43.3 | ||
| High (first and second stage of tertiary education) | 709 | 37.4 | ||
| Missing | 34 | 1.8 |