| Risk factors | Effectif |
| Medical history | 8 |
| Icterus | 4 |
| Endoscopy | 2 |
| Blood transfusion | 2 |
| Surgical history | 10 |
| Surgical intervention | 3 |
| Circoncision | 7 |
| Female genital mutilation (FGM) | 3 |
| Dental care | 3 |
| Human bite | 3 |
| Scarification | 3 |
| Collective use of sharp objects | 8 |
| Nails clipper | 8 |
| Razor | 4 |
| Blade | 3 |