Table 1 Inclusion and exclusion criteria

Participants

18–50 years (Average age to fall in this range)

▪ Evidence of OA (> 10% of cohort with Tönnis grade 2 and above or joint space width of > 2 mm)

 ▪ Dysplasia (LCEA mean for cohort < 20° &/or > 10% of the group with LCEA < 20°)

Intervention

Primary hip arthroscopy

▪ Secondary hip arthroscopy

 ▪ Arthroscopy following hip joint arthroplasty

 ▪ Studies in which arthroscopic and open procedures are combined

 ▪ Studies in which primary focus is non-articular surgery

 ▪ Studies in which periarticular osteotomy forms part of the procedure

Study types

Level IV evidence or above (RCT; prospective and retrospective observational studies)

▪ Case series < 5 participants

 ▪ Published abstracts and non-peer-reviewed studies

 ▪ Non-English language papers

Outcomes

Report change in physical activity and/or volume of sport participation

▪ Papers solely reporting prevalence of return to sport/return to play and/or sport-specific measures such as number of goals scored/career length

 ▪ Return to work (including military service)

 ▪ PROMs in which physical activity-related outcomes do not exceed normal activities of daily living