Clinical Orthopaedics and Related Research®

, Volume 471, Issue 2, pp 593–599 | Cite as

Intraoperative Cartilage Degeneration Predicts Outcome 12 Months After Hip Arthroscopy

  • Thorlene EgertonEmail author
  • Rana S. Hinman
  • Amir Takla
  • Kim L. Bennell
  • John O’Donnell
Clinical Research



When considering arthroscopic surgery for treatment of hip pain, it is important to understand the influence of joint degeneration on the likelihood of success. Previous research has shown poorer outcomes among patients with osteoarthritis but new arthroscopic techniques including femoroacetabular impingement correction and microfracture may lead to better arthroscopic outcomes.


We investigated the effect of intraarthroscopic articular and rim cartilage degeneration on the outcome after hip arthroscopy using contemporary techniques.


The modified Harris hip score (MHHS) and nonarthritic hip score (NAHS) were completed preoperatively and 12 months postoperatively by 560 patients undergoing hip arthroscopy after March 2007. Change in these scores was compared between patients with and without acetabular or femoral articular cartilage degeneration and between patients with and without rim cartilage degeneration. Correlation and regression analyses were used to predict the change in outcome scores based on the severity of cartilage degeneration.


Hips without degeneration had greater improvement in the outcome scores. The presence of cartilage degeneration showed negative correlations with change in outcomes. The best model to explain change in MHHS included preoperative score, articular cartilage degeneration grade, and rim lesion grade (adjusted R2 = 0.24).


Our data support previous findings regarding the negative influence of cartilage degeneration on improvement after hip arthroscopy. Nevertheless, many patients with cartilage degeneration still improved and the severity of degeneration accounts for little of the resulting variance in change. Future studies must determine the clinical importance of the improvements gained by patients with cartilage degeneration and identify other predictors of outcome.

Level of Evidence

Level III, prognostic study. See Instructions for Authors for a complete description of levels of evidence.


Articular Cartilage NAHS Cartilage Degeneration Preoperative Score Labral Repair 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We thank Jess O’Donnell BA, BComm, for assisting with extraction of data from the database for this study.


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Copyright information

© The Association of Bone and Joint Surgeons® 2012

Authors and Affiliations

  • Thorlene Egerton
    • 1
    Email author
  • Rana S. Hinman
    • 1
  • Amir Takla
    • 2
  • Kim L. Bennell
    • 1
  • John O’Donnell
    • 3
  1. 1.Centre for Health Exercise & Sports MedicineThe University of MelbourneCarltonAustralia
  2. 2.Ivanhoe Sports & Physiotherapy ClinicIvanhoeAustralia
  3. 3.RichmondAustralia

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