Cultural adaptation and Turkish version of the Late-Life Function and Disability Instrument for individuals with gonarthrosis: A validity and reliability study

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dc.contributor.authorHazar, Yağmur
dc.contributor.authorAtıcı, Emine
dc.contributor.authorÇağlıyan Erdoğan, Hande
dc.contributor.authorKardesş Kübra
dc.date.accessioned2026-07-08T10:16:25Z
dc.date.available2026-07-08T10:16:25Z
dc.date.issued2025
dc.departmentAÇÜ, Rektörlük, Bilim Teknoloji Uygulama ve Araştırma Merkezi
dc.description.abstractPurposes: This study aimed to culturally adapt and assess the psychometric properties of the Turkish version of the Late-Life Function and Disability Instrument (LLFDI) in elderly individuals with knee osteoarthritis (gonarthrosis). Methods: A total of 240 participants aged ≥65 were selected using simple random sampling. The adaptation process followed Beaton’s guidelines and included translation, back-translation, and pilot testing. Reliability was assessed using Cronbach’s alpha, test-retest, and intraclass correlation coefficients (ICC), while validity was evaluated via exploratory and confirmatory factor analyses and convergent validity with established scales. As part of convergent validity, the relationship of the LLFDI with Barthe Index (BI) and the Functional Independent Measurement (FIM), the Lequesne Index were used. The correlations between the LLFDI scores and these scales were analyzed to determine the level of convergent validity. Results: The LLFDI demonstrated high internal consistency (Cronbach’s α > 0.70) and test-retest reliability (ICC = 0.734–0.899). Construct validity was supported by Exploratory Factor Analysis (KMO = 0.838–0.952) and significant Bartlett’s Test (p < 0.001), revealing appropriate factor structures. Convergent validity was confirmed through significant correlations with the BI, FIM, and Lequesne Index. Conclusion: This study demonstrated that the Turkish version of the LLFDI is a valid and reliable assessment tool for individuals diagnosed with gonarthrosis. Clinical Trials: NCT06858085.
dc.identifier.doi10.1080/09638288.2025.2587063
dc.identifier.issn09638288
dc.identifier.pmid41236801
dc.identifier.scopus2-s2.0-105021941184
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://hdl.handle.net/11494/6270
dc.identifier.wosWOS:001616362600001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakScopus
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakPubMed
dc.institutionauthorÇağlıyan Erdoğan, Hande
dc.language.isoen
dc.publisherTaylor and Francis Ltd.
dc.relation.ispartofDisability and Rehabilitation
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/embargoedAccess
dc.subjectAging
dc.subjectCultural adaptation
dc.subjectGonarthrosis
dc.subjectLate-Life Function and Disability Instrument (LLFDI)
dc.subjectPsychometric properties
dc.subjectTurkish language
dc.titleCultural adaptation and Turkish version of the Late-Life Function and Disability Instrument for individuals with gonarthrosis: A validity and reliability study
dc.typeArticle

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