| Cause | Hip number | IIA | IIB | IIC |
| Cortine | 28 | 6 | 14 | 8 |
| Alcohol | 28 | 4 | 14 | 10 |
| Trauma | 10 | 3 | 3 | 4 |
| Idiopathetic | 8 | 2 | 3 | 3 |