Evidence map›Paper›PMID 18602843›Full record

ArticleOsteoarthritis and cartilage2009

The 12-item Oxford Knee Score: cross-cultural adaptation into German and assessment of its psychometric properties in patients with osteoarthritis of the knee.

F D Naal, F M Impellizzeri, M Sieverding, M Loibl, F von Knoch, A F Mannion, M Leunig, U Munzinger

Registry-linked trialAbstract readValidation Study
PubMed Publisher
In one paragraph

Article in Osteoarthritis and cartilage, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02998125 (A Psychometric Analysis of the Arabic Version of Oxford Knee Score Before and After Total Knee Arthroplasty in a Middle East Population and an Exploration of Outcomes Post-total Knee Arthroplasty in the Middle East), which is not on this map. Cited by 57 papers.

0numbers the graph read from it
0cells of the map it votes in
57citing papers in PubMed
–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.

NCT02998125 completednot on this mapstarted 2017, after this paper: background citation

A Psychometric Analysis of the Arabic Version of Oxford Knee Score Before and After Total Knee Arthroplasty in a Middle East Population and an Exploration of Outcomes Post-total Knee Arthroplasty in the Middle East

TypeobservationalSponsorUniversity of SalfordRan2017 to 2020Enrolled116ConditionsTotal Knee ArthroplastyArmsTotal knee arthroplasty
3 · Its place in the literature

Who cites it

57 citing papers in PubMed.

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  5. Early results of a new rotating hinge knee implant.BioMed research international · 2014
    Trial
  6. Individualised total knee arthroplasty demonstrates 99.4% survival at 3 to 5 years.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026
    Observational
  7. Article
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  14. Not all questions are created equal: the weight of the Oxford Knee Scores questions in a multicentric validation study.Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology · 2023
    Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors.

F D NaalDepartment of Orthopaedic Surgery, Schulthess Clinic, Zurich, Switzerland. florian.naal@gmail.com
F M Impellizzeri
M Sieverding
M Loibl
F von Knoch
A F Mannion
M Leunig
U Munzinger

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo cross-culturally adapt and validate the Oxford Knee Score (OKS) for use in German-speaking patients with osteoarthritis of the knee.

methodsAfter the cross-cultural adaptation (OKS-D), the following metric properties of the questionnaire were assessed in 100 consecutive patients (mean age 66.5 years, 61 women) undergoing total knee replacement: feasibility (percentage of fully completed questionnaires), reliability (Intraclass Correlation Coefficients [ICC] and Bland and Altman's limits of agreement), and construct validity (correlation with the Western Ontario and McMaster Universities Index [WOMAC], Knee Society Score [KSS], Activities of Daily Living Scale [ADLS], and Short Form 12 [SF-12]), floor and ceiling effects, and internal consistency (Cronbach's Alpha, CA).

resultsWe received 91.9% fully completed questionnaires. Reliability of the OKS-D was excellent (ICC 0.91). Bland and Altman's limits of agreement revealed no significant bias (-0.2) and a random error of 6.2. Correlation coefficients with the other questionnaires ranged from -0.22 (SF-12 Mental Component Scale [MCS]) to -0.77 (ADLS). We observed no floor or ceiling effects. The CA was 0.83.

conclusionsThe German version of the OKS is a reliable and valid measure for the self-assessment of pain and function in German-speaking patients with osteoarthritis of the knee.

Indexed as

Severity of Illness IndexAgedAged, 80 and overCross-Cultural ComparisonFemaleGermanyHumansKnee JointLanguageMaleMiddle AgedOsteoarthritis, KneePain MeasurementPsychometricsReproducibility of Results

Identifiers

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Registered trials

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.