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The Capital Region of Denmark - a part of Copenhagen University Hospital
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Good validity and reliability of the forgotten joint score in evaluating the outcome of total knee arthroplasty

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  1. Minimal important change values for the Oxford Knee Score and the Forgotten Joint Score at 1 year after total knee replacement

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. High risk for revision after shoulder arthroplasty for failed osteosynthesis of proximal humeral fractures

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Acetabular cup position and risk of dislocation in primary total hip arthroplasty

    Research output: Contribution to journalJournal articleResearchpeer-review

  4. Temporal trends in the use of antithrombotics at admission

    Research output: Contribution to journalJournal articleResearchpeer-review

  5. An enhanced treatment program with markedly reduced mortality after a transtibial or higher non-traumatic lower extremity amputation

    Research output: Contribution to journalJournal articleResearchpeer-review

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Background and purpose - When evaluating the outcome after total knee arthroplasty (TKA), increasing emphasis has been put on patient satisfaction and ability to perform activities of daily living. To address this, the forgotten joint score (FJS) for assessment of knee awareness has been developed. We investigated the validity and reliability of the FJS. Patients and methods - A Danish version of the FJS questionnaire was created according to internationally accepted standards. 360 participants who underwent primary TKA were invited to participate in the study. Of these, 315 were included in a validity study and 150 in a reliability study. Correlation between the Oxford knee score (OKS) and the FJS was examined and test-retest evaluation was performed. A ceiling effect was defined as participants reaching a score within 15% of the maximum achievable score. Results - The validity study revealed a strong correlation between the FJS and the OKS (intraclass correlation coefficient (ICC) = 0.81, 95% CI: 0.77-0.85; p < 0.001). The test-retest evaluation showed almost perfect reliability for the FJS total score (ICC = 0.91, 95% CI: 0.88-0.94) and substantial reliability or better for individual items of the FJS (ICC? 0.79). We found a high level of internal consistency (Cronbach's? = 0.96). The ceiling effect for the FJS was 16%, as compared to 37% for the OKS. Interpretation - The FJS showed good construct validity and test-retest reliability. It had a lower ceiling effect than the OKS. The FJS appears to be a promising tool for evaluation of small differences in knee performance in groups of patients with good clinical results after TKA.

Original languageEnglish
JournalActa Orthopaedica (Online)
Volume87
Issue number3
Pages (from-to)280-285
ISSN1745-3682
DOIs
Publication statusPublished - 2016

ID: 46365721