Table 1 Crowe classification [1]
From: Current concepts in developmental dysplasia of the hip and Total hip arthroplasty
| Type | Proximal displacement | Femoral head subluxation |
|---|---|---|
| Crowe I | < 10% | < 50% |
| Crowe II | 10–15% | 50–75% |
| Crowe III | 15–20% | 75–100% |
| Crowe IV | > 20% | > 100% |