EP232 A Systematic Review of Clinical Outcomes After Periacetabular Osteotomy in Patients with Borderline Hip Dysplasia
Bibliographic record
Abstract
Abstract Background The impact of periacetabular osteotomy (PAO) on clinical outcomes in patients with borderline hip dysplasia (BHD) remains uncertain. The purpose of this study was to perform a systematic review of clinical outcomes in patients with BHD undergoing PAO. Methods A systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines by searching PubMed, the Cochrane Library, and Embase to identify English language studies reporting on clinical outcomes in patients with BHD undergoing PAO. The search phrase used was: periacetabular osteotomy borderline hip dysplasia. The outcomes assessed were conversion to total hip arthroplasty (THA), return-to-sports (RTS) rates, and patient-reported outcomes (PROs) including the modified Hip Harris Score (mHHS), Hip Outcome Score (HOS), Subjective Hip Value (SHV), Hip Disability and Osteoarthritis Outcome Score (HOOS), Short-Form Health Survey (SF-12 or SF-36), International Hip Outcome Tool (iHOT-12 or iHOT-33), and the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores. Results Eleven studies (2 Level III, 9 Level IV) out of 198 met the inclusion criteria, including a total of 657 hips with an average patient age of 26.9 years and a mean follow-up time of 48.1 months. The average body mass index was 23.3 kg/m2 and the overall percentage of males was 13.0%. Four studies demonstrated a significant improvement in the mHHS, with a total weighted mean increasing from 62.6 preoperatively to 82.9 postoperatively. Three studies found significant improvement only in the physical domain of the SF-12 or SF-36, with a total weighted average increasing from 37.8 preoperatively to 47.6 postoperatively. Two studies found significant improvement in iHOT scores. Two studies found significant improvement in the SHV score. The overall reoperation rate was 9.5%, with a rate of conversion to THA of 0.2%. The majority of reoperations occurred due to irritation from implants. One study found the RTS rate among preoperatively active patients to be 92.5%, with most resuming sports activity within six months. Conclusion In patients with BHD undergoing PAO, there is consistent improvement in most PROs along with a low rate of reoperation and conversion to THA.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.009 | 0.040 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.012 | 0.011 |
| Bibliometrics | 0.011 | 0.011 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.003 | 0.002 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.008 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".