Table 1. Absolute and percentage distribution of the variables age, sex, skin color, Dental Aesthetic Index and Oral Health Impact Profile in adolescents enrolled in public schools.
| Variables | n | % |
| Age (years) | ||
| 11 | 14 | 1.7 |
| 12 | 254 | 31.2 |
| 13 | 225 | 27.6 |
| 14 | 259 | 31.8 |
| 15 | 55 | 6.7 |
| 16 | 8 | 1.0 |
| Sex | ||
| Female | 488 | 59.9 |
| Male | 327 | 40.1 |
| Skin color | ||
| White | 333 | 40.9 |
| Black | 97 | 11.9 |
| Brown | 385 | 47.2 |
| Previous orthodontic treatment | ||
| Yes | 190 | 23.3 |
| No | 625 | 76.7 |
| Would like to correct the teeth to improve the appearance? | ||
| Yes | 745 | 91.4 |
| No | 70 | 8.6 |
| Dental Aesthetic Index (DAI) | ||
| ≤ 25 (no abnormality or mild malocclusion) | 491 | 60.2 |
| 26-30 (defined malocclusion) | 179 | 22.0 |
| 30-35 (severe malocclusion) | 78 | 9.6 |
| ≥ 36 (severe or crippling malocclusion) | 67 | 8.2 |
| Oral health impact profile (OHIP- 14) | ||
| Good (≤ 8) | 439 | 53.9 |
| Bad (> 9) | 376 | 46.1 |