EP125 Survival Analysis and Patient Reported Outcomes Following Revision Hip Arthroscopy for Femoroacetabular Impingement in Patients Over 50: Minimum 10-Year Follow Up
Bibliographic record
Abstract
Abstract Background Currently, little is known about the long-term outcomes of patients over the age of 50 who underwent revision hip arthroscopy. This study aims to assess patient reported outcomes (PROs) and risk factors associated with subsequent surgery in patients over the age of 50 who underwent revision hip arthroscopy for treatment of femoroacetabular impingement (FAI). Methods Patients over 50 who underwent revision hip arthroscopy before 2013 by the senior author were included. PROs were obtained preoperatively,- and at minimum 10 years postoperatively, including 12-Item Short Form Survey Physical Component Score (SF-12 PCS), 12-Item Short Form Survey Mental Component Score (SF-12 MCS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), modified Harris Hip Score (mHHS), Vail Hip Score (VHS), Hip Outcome Score – Activities of Daily Living (HOS-ADL), and Hip Outcome Score – Sport (HOS-Sport). Results A total of 45 patients were identified, and 37 (82.2%) patients provided follow-up at a mean of 11.98 ± 2.27 years. The mean age at the time of surgery was 55 ± 4 years and most patients were female (n=26, 70%). Additionally, 6 (16%) patients underwent a microfracture procedure at the time of surgery, and 20 (54%) were found to have an Outerbridge grade 3 or 4 cartilage defect. Of the 37 patients who completed follow-up, 19 (51%) had a subsequent surgery including 13 (35%) who had a THA and 6 (16%) who had a revision hip scope. Patients had a survival rate of 71% and 64% at 5 and 10 years, respectively. The remaining 18 patients with completed follow up reported improvement in mHHS, HOS-ADL, HOS-Sport, WOMAC Total, and SF-12 PCS, but no improvement in SF-12 MCS from baseline at a minimum 10-year follow-up. Additionally, most patients achieved HOS-ADL and mHHS MCID and PASS, but only 47% of patients achieved HOS-Sport PASS. Conclusion The findings of the present study suggest revision hip arthroscopy is a viable procedure in patients over 50, with 65% of patients preserving their native hip at 10-years post-operatively. Notably, patients who did not require a revision hip scope or convert to THA demonstrated significant improvement in PROs.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".