Table 1 Characteristics of survey sample
| Â | Number | Percent |
|---|---|---|
Gender | ||
 Male | 1530 | 51.6 |
 Female | 1437 | 48.4 |
Age | ||
 11–15 years | 1615 | 54.4 |
 16–17 years | 1352 | 45.6 |
 Mean age in years (SD) | 14.6 | (2.0) |
Index of relative socio-economic disadvantage | ||
 Lowest quintile (least advantaged) | 473 | 15.9 |
 Second quintile | 554 | 18.7 |
 Third quintile | 543 | 18.3 |
 Fourth quintile | 676 | 22.8 |
 Highest quintile (most advantaged) | 721 | 24.3 |
Parent or carer education | ||
 Bachelor degree of higher | 911 | 32.4 |
 Diploma or certificate | 1268 | 45.2 |
 Secondary education | 631 | 22.4 |
Weight status | ||
 Normal | 2030 | 74.1 |
 Overweight/obesity | 711 | 25.9 |
BMI Mean SD | ||
 Mean (SD) | 21.2 | (4.5) |