2. Summary of excluded studies.
| Author | Type of study | Intervention 1 | Intervention 2 or Comparator | Unit of analysis and no. in each group | Outcome | AEs |
| Espinosa 2006 | Observational; comparative case series | 1. Open surgery: osteoplasty + labral resection | 2. Open surgery: osteoplasty + labral refixation | Hips 1. 25 2. 35 |
Mean Merle d’Aubigné score (range) Pre‐operative 1. 12 (8‐13) 2. 12 (5‐16) 24 m post‐operative 1. 15 (10‐18) 2. 17 (13‐18) |
None reported |
| Bardakos 2008 | Observational; comparative case series | 1. Arthroscopic: osteoplasty | 2. Arthroscopic: debridement | Patients 1. 24 2. 47 |
Median HHS (IQR) Pre‐operative 1. 59 (52‐64) 2. 55 (37‐72) 12 m post‐operative 1. 83 (75‐87) 2. 77 (59‐87) |
None reported |
| Larson 2009 | Observational; comparative case series | 1. Arthroscopic: osteoplasty+labral debridement | 2. Arthroscopic: osteoplasty + labral repair | Hips 1. 36 2. 39 |
Mean MHHS 12m post op 1. 88 2. 94 |
1. Revision to THA=1 patient 2. Heterotopic ossification=3 patients 3. Revision osteoplasty=2 patients |
| Gedouin 2010 | Observational; case series | 1. Arthroscopic: osteoplasty | None | Hips 1. 111 |
Mean WOMAC score (SD) Pre‐operative 1. 60 (±14) Post‐operative at mean 10 m 1. 83 (±16) |
1. Revision to THA=5pts 2. Heterotropic ossification=3 patients 3. Neuropraxia=2 patients 4. Skin necrosis=1 patient |
| Schilders 2011 | Observational; comparative case series | 1. Arthroscopic: osteoplasty + labral repair | 2. Arthroscopic: osteoplasty + labral resection | Hips 1. 69 2. 32 |
Mean MHHS (range) Pre‐operative 1. 60 (24‐85) 2. 62 (29‐96) Post‐operative at mean 29 m 1. 93 (55‐100) 2. 88 (35‐100) |
None reported |
| Bulbul 2012 | Observational; case series | 1. Open surgery: osteoplasty | None | Pts 1. 13 |
Mean HHS (range) Pre‐operative 1. 63 (55‐70) Post‐operative 24 m 1. 89 (72‐98) |
None reported |
| Malviya 2012 | Observational; case series | 1. Arthroscopic: osteoplasty | None | Patients 1. 612 |
Mean Rosser Index Matrix‐created QoL score (range) Pre‐operative 1. 0.9 (‐1.4‐0.9) Post‐operative 12 m 1. 0.9 (0.7‐1) |
None reported |
| Palmer 2012 | Observational; case series | 1. Arthroscopic: osteoplasty | None | Hips 1. 201 |
Mean NAHS increased by 24 post‐operative at mean 46 m | None reported |
| Domb 2013 | Observational; comparative case series | 1. Open surgery: osteoplasty | 2. Arthroscopic: osteoplasty | Patients 1. 10 2. 20 |
Mean improvement in MHHS post‐operative at mean 24.8 m (range) 1. 22 (±12) 2. 24 (±11) |
None reported |
| Krych 2013 | Randomised trial comparing two different surgical interventions | 1. Arthroscopic: osteoplasty + labral repair | 2. Arthroscopic: osteoplasty + labral debridement | Patients 1. 18 2. 18 |
Mean HOS‐ADL (range) Pre‐operative 1. 68 (26‐92) 2. 60 (23‐91) Post‐operative at mean 32 m 1. 91 (73‐100) 2. 80 (42‐100) |
None reported |
| Zingg 2013 | Partly* randomised trial comparing two different surgical interventions | 1. Arthroscopic: osteoplasty | 2. Open surgery: osteoplasty | Patients 1. 23 2. 15 |
Mean pain on a VAS at rest (SD) Pre‐operative 1. 15 (21) 2. 18 (13) 12 m post‐operative 1. 5 (12) 2. 15 (22) |
None reported |
m = months, f/u = follow‐up, HHS = Harris Hip Score, IQR = interquartile range, SD = standard deviation, THA = total hip arthroplasty, * = 10 out of 38 patients included were randomised
Key to outcome measures:
Merle d’Aubigné ‐ expressed as a score out of 18 (18 being the best outcome);
Harris Hip Score (HHS) ‐ expressed as a score out of 100 (100 being the best outcome);
Modified Harris Hip Score (MHHS) ‐ expressed as a score out of 100 (100 being the best outcome);
Harris Hip Score Acitivities of Daily Living (HOS‐ADL) ‐ expressed as a score out of 100 (100 being the best outcome);
Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) ‐ expressed as a score out of 100 (100 being the best outcome);
Rosser Index Matrix‐created QoL ‐ expressed as a score from ‐1.486 to 1.000 (a score of 1.000 indicates normality and death is given a score of 0.000);
Non Arthritic Hip Score (NAHS) ‐ expressed as a score out of 100 (100 being the best outcome);
Visual Analogue Scale (VAS) at rest for pain ‐ expressed as a score out of 100 (0 being no pain).