Criteria of all studies compared against Nepple et al13 criteria
| Frequency of diagnostic criteria from Nepple et al13 | |
| Criteria | Studies reporting criteria |
| Hip pain >3 months | 26 (24%) |
| No clinical evidence of inflammatory arthritis changes | 69 (64%) |
| Hip internal rotation <20 in 90° hip flexion | 6 (6%) |
| Lateral centre edge (CE) angle>20° | 18 (17%) |
| Alpha angle >60°, CE angle >40° or presence of acetabular retroversion | 72 (67%) |
| Alpha >60° | 2 (2%) |
| CE angle >40° | 8 (7%) |
| Acetabular retroversion (stating crossover sign) | 62 (57%) |
| Diagnostic injection or MRI indicating presence of intra-articular pathology or labral damage | 66 (61%) |