| Preoperative | Postoperative stage | ||||
| Staging | Number hip | IIA | IIB | IIC | III |
| IIa | 15 | 15 | 0 | 0 | 0 |
| IIb | 34 | 0 | 29 | 1 | 4 |
| IIc | 25 | 0 | 0 | 19 | 6 |