| Age range | Frequency | Percentage |
| 6 to 11 years old | 01 | 05.0 |
| 12 to 17 years old | 17 | 85.0 |
| 18 and over | 02 | 10.0 |
| Total | 20 | 100.0 |
| Sex | Frequency | Percentage |
| Male | 19 | 95.0 |
| Female | 1 | 5.0 |
| Total | 20 | 100.0 |
| Etiologies | Frequency | Percentage |
| ACR | 19 | 95.0 |
| Sports accident | 1 | 5.0 |
| Total | 20 | 100.0 |