Table 2

Criteria of all studies compared against Nepple et al13 criteria

Frequency of diagnostic criteria from Nepple et al13
CriteriaStudies reporting criteria
Hip pain >3 months26 (24%)
No clinical evidence of inflammatory arthritis changes69 (64%)
Hip internal rotation <20 in 90° hip flexion6 (6%)
Lateral centre edge (CE) angle>20°18 (17%)
Alpha angle >60°, CE angle >40° or presence of acetabular retroversion72 (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 damage66 (61%)