Table 1.
Sociodemographic characteristics of 3816 participants in the 2018 Greek arm of the HBSC * study.
| Gender, n (%) | |
| Boys | 1898 (49.7%) |
| Girls | 1918 (50.3%) |
| Age Group, n (%) | |
| 11-years-old | 1216 (31.9%) |
| 13-years-old | 1299 (34.0%) |
| 15-years-old | 1301 (34.1%) |
| Region/municipality, n (%) | |
| Attica | 1427 (37.4%) |
| Thessaloniki | 557 (14.6%) |
| Other | 1832 (48.0%) |
| Place of birth, n (%) | |
| Greece | 3675 (96.3%) |
| Other | 141 (3.7%) |
| Grade, n (%) | |
| 6th | 1241 (32.5%) |
| 8th | 1307 (34.3%) |
| 10th | 1268 (33.2%) |
| Family Affluence scale (FAS) score a, n (%) | |
| Low 20% affluence | 545 (14.6%) |
| Middle 60% affluence | 2392 (64.0%) |
| High 20% affluence | 803 (21.4%) |
a: Quantiles were calculated based on the FAS score distribution by gender and age group. * HBSC: Health Behaviour in School-aged Children study.