| Graf type | Angle | Incidence rate |
| All type I Type IIa Type IIb | Alpha angle > 60 degrees (normal) Beta angle < 55 degrees Beta angle > 55 degrees | 89% |
| All type II Type IIa Type IIb Type IIc | Alpha angle 50 - 59 degrees Alpha angle 50 - 59 degrees Alpha angle 43 - 49 degrees Beta angle < 77 degrees | 10.3%
0.2% |
| Type D (“about to decenter”) | Alpha angle 43 - 49 degrees Beta angle > 77 degrees | 0.4% |
| Type III Type IIIa and IIIb distinguished on the grounds of structural alteration of the cartilaginous roof | Alpha angle < 43 degrees | 0.08% |
| Type IV (dislocated with labrum interposed between femoral head and acetabulum) | Alpha angle < 43 degrees | 0.02% |