| Characteristics | % | |
|---|---|---|
| Sex | Boys | 35.2 |
| Girls | 64.8 | |
| Age groups | 9–13 years | 7.3 |
| 13–19 years | 49.2 | |
| 20 years and more | 43.5 | |
| Ethnicity | Caucasian | 53.9 |
| From Maghreb | 32.6 | |
| From Africa | 12.4 | |
| From Asia | 1.0 | |
| General health problems | None | 86.5 |
| Related to oral sphere | 6.2 | |
| Not related to oral sphere | 7.3 |