| Past medical history | Number |
| Types of major sickle cell disease |
|
| SC | 36 |
| SS | 3 |
| S/beta thalassémia | 3 |
| Chronic complications of sickle cell |
|
| Proliferative retinopathy | 12 |
| Necrosis of the femoral head | 3 |
| Cholelithiasis | 3 |
| Osteomyelitis | 2 |
| Glomerulonephritis | 1 |