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Patellofemoral Osteoarthritis Progresses After Medial Open‐Wedge High Tibial Osteotomy: A Systematic Review

2021· review· en· 24 citations· W3157295148 on OpenAlex· 10.1016/j.arthro.2021.04.015

Why is this work in the frame?

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

Canadian affiliationAn author listed a Canadian institution. This is the only route the usual frame has.

The three-model screen

all 1,000 screened works →

All three models called this out of scope.

stratum: aff_core · design weight: 5595.24 (the sample is stratified; any rate computed without the weight is wrong)
Claude Opus 4.8OUT
genre: empirical
about Canada: no
confidence: high

Systematic review used to answer a clinical question about osteoarthritis progression after osteotomy.

GPT-5.6 (high)OUT
genre: empirical
about Canada: no
confidence: high

This systematic review answers a clinical question about osteoarthritis progression rather than studying evidence synthesis methods.

Grok 4.5OUT
genre: empirical
about Canada: no
confidence: high

Clinical systematic review answering a surgical/OA outcomes question; uses synthesis method rather than studying it.

Abstract

Purpose To investigate the progression of patellofemoral (PF) osteoarthritis (OA) after medial open‐wedge high tibial osteotomy (OWHTO) and whether PF OA progression has an influence on clinical outcomes. Methods According to the Preferred Reporting Items for Systematic Review and Meta‐analyses (PRISMA), EMBASE, PubMed, and Cochrane Library were searched in June 2020 for English‐language studies that presented data on PF OA or cartilage degeneration before and after OWHTO. Descriptive statistics are presented. Results Twenty studies comprising 1,173 patients were included. The mean age was 57.1 years (range 18‐84) with 826 (70.4%) female. The mean follow‐up was 27.1 months (range 7‐144). Ten studies reported the trochlear International Cartilage Research Society (ICRS) scores, with each of these studies reporting a greater proportion of patients with grades 2‐4 OA postoperatively compared with preoperatively (relative risk = 1.19‐2.76, I 2 = 1.9%). Similarly, 7 studies reported patellar ICRS scores and found a greater proportion with grades 2‐4 OA postoperatively (relative risk = 1.08‐2.44, I 2 = 0%). Four studies assessed PF Kellgren–Lawrence grade, each of which reported a greater proportion of patients with grades 2‐4 OA postoperatively (relative risk = 1.25‐21.0, I 2 = 31%). The PF OA assessments were heterogenous, and studies using classifications except the ICRS score or Kellgren‐Lawrence grade were not included in statistical analysis. Fifteen studies assessed patellar height; 10 studies reported significant decrease in patellar height after OWHTO. Only 3 studies reported clinical outcomes for patients with and without PF OA progression. Outcome reporting was variable across these studies, and a relationship between PF OA progression and clinical outcome could not be definitively determined. Conclusions Patients appear to have progression of PF OA after medial OWHTO. However, there are currently insufficient studies with inconsistent measurements of outcomes to make meaningful conclusions regarding the impact of PF OA on clinical outcomes. Level of Evidence Level IV, systematic review of Level III‐IV studies.

Stored with the screening record, where it is evidence for the labels above.

The record

Venue
Arthroscopy The Journal of Arthroscopic and Related Surgery
Topic
Total Knee Arthroplasty Outcomes
Field
Medicine
Canadian institutions
McMaster University Medical Centre
Funders
Keywords
High tibial osteotomyMedicineOsteoarthritisCochrane LibraryRelative riskMeta-analysisOsteotomySurgeryInternal medicineConfidence intervalPathology
Has abstract in OpenAlex
yes