Table 1 Characteristics and distribution of study variables of eighth and tenth grade students participating in the Amsterdam Youth Health Monitor between school years 2010–2011 and 2014–2015
| Â | Grade 8 | Grade 10 | Total |
|---|---|---|---|
Participants (n) | 10,009 | 7674 | 17,683 |
Mean age (years) | 14.01 | 15.96 | 14.86 |
Sex (%) | |||
 Boys | 47.4 | 45.6 | 46.6 |
 Girls | 52.6 | 54.4 | 53.4 |
Ethnicity (%) | |||
 Dutch | 39.7 | 40.4 | 40.0 |
 Surinamese | 10.8 | 10.9 | 10.8 |
 Turkish | 9.0 | 9.2 | 9.0 |
 Moroccan | 15.8 | 15.3 | 15.6 |
 Other | 24.7 | 24.3 | 24.5 |
Overweight, excl. Obese (%) | 18.0 | 16.1 | 17.1 |
Obese, excl. Overweight (%) | 5.5 | 4.7 | 5.2 |
Bullying victimization (%) | 7.1 | 1.9 | 4.8 |
Psychosocial problems (%) | 10.6 | 8.2 | 9.5 |
Suicidal thoughts (%) | 16.5 | 9.6 | 13.5 |