| Causes | Number of cases (n) | Percentage (%) |
| Femoral neck fracture | 76 | 78 |
| Garden IV | 60 | - |
| Garden III | 13 | - |
| Garden II | 3 | - |
| Aseptic osteonecrosis of the femoral head | 14 | 15 |
| Coxarthrosis | 7 | 7 |
| Total | 97 | 100 |