| Classifications | Description |
| Severin |
|
| 1 | Normal |
| 2 | Moderate deformity of femoral head or neck or acetabulum |
| 3 | Dysplastic no subluxed |
| 4 | Subluxed |
| 5 | Head articulating with secondary acetabulum in upper of the original acetabulum |
| 6 | Dislocated |
| 7 | Arthritic |
| Kalamchi |
|
| 1 | Changes affecting the ossific nucleus |
| 2 | Lateral physeal damage |
| 3 | Central physeal damage |
| 4 | Total damage to the head and physis |