Evidence map›Paper›PMID 33044708›Full record

ArticleArchives of orthopaedic and trauma surgery2021

Early post-operative oxford knee score and knee society score predict patient satisfaction 2 years after total knee arthroplasty.

Graham S Goh, Hamid Rahmatullah Bin Abd Razak, Darren Keng-Jin Tay, Ngai-Nung Lo, Seng-Jin Yeo

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Article in Archives of orthopaedic and trauma surgery, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Review
  4. Article
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  6. A clinical risk score enables early prediction of dissatisfaction 1 year after total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025
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  12. Global mapping of institutional and hospital-based (Level II-IV) arthroplasty registries: a scoping review.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2024
    Article
  13. Article
  14. Preoperative stiffness is the most important predictor of postoperative patient's satisfaction after total knee arthroplasty.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2023
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  15. [Results and complications of knee arthroplasty in patients with obesity].Revista medica del Instituto Mexicano del Seguro Social · 2023
    Observational
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  18. A validated outcome categorization of the knee society score for total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Graham S GohDepartment of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia, Level 4, Singapore, 169865, Singapore. goh.graham@gmail.com.ORCID http://orcid.org/0000-0002-7337-3321
Hamid Rahmatullah Bin Abd RazakDepartment of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia, Level 4, Singapore, 169865, Singapore.
Darren Keng-Jin TayDepartment of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia, Level 4, Singapore, 169865, Singapore.
Ngai-Nung LoDepartment of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia, Level 4, Singapore, 169865, Singapore.
Seng-Jin YeoDepartment of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia, Level 4, Singapore, 169865, Singapore.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThere is poor correlation between functional outcomes and patient satisfaction following total knee arthroplasty (TKA). We asked if early post-operative scores at 6 months or the pre- to post-operative change in scores are predictive of patient satisfaction 2 years after TKA.

methodsWe conducted a retrospective review of prospectively collected registry data of 4359 TKAs performed at a single institution. At 6 months and 2 years, the Knee Society Score (KSS), Oxford Knee Score (OKS), and Short-Form 36 scores were assessed. A satisfaction questionnaire was also completed. Logistic regression was used to generate receiver-operating characteristic (ROC) curves to assess the ability of each scoring system in predicting satisfaction at 2 years.

resultsAt 2 years, 91.1% of patients were satisfied. For the absolute post-operative OKS at 6 months, an AUC of 0.762 (95% CI 0.736-0.788) and a threshold of ≤ 21.5 points (or ≥ 38.5 points on the new scale) were obtained. For the KSS knee score, an AUC of 0.704 (95% CI 0.674-0.734) and a threshold of ≥ 80.5 points were identified. The OKS performed significantly better than the KSS knee score (p = 0.03) and the other post-operative scores (p < 0.001). When analysing the change in scores pre-operatively to 6 months, the AUC was < 0.7 for all scales.

conclusionsEarly post-operative scores, specifically the OKS and KSS knee score, can predict patient satisfaction at 2 years after TKA with good accuracy. The threshold values offer surgeons an additional tool to identify patients at risk of dissatisfaction at 2 years, enabling them to intervene earlier to ensure good patient satisfaction. LEVEL OF EVIDENCE: III, retrospective cohort study.

Indexed as

Arthroplasty, Replacement, KneeHumansKnee JointPatient Outcome AssessmentPatient SatisfactionPostoperative PeriodRetrospective StudiesSurveys and QuestionnairesKnee arthroplastyKnee society scoreOutcomesOxford knee scorePredictorsSatisfaction

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.