ArticleClinical rheumatology2025
Adaptation of the knee quality of life 26-item questionnaire to turkish: cultural adaptation, reliability, and validity.
Article in Clinical rheumatology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Cross-Cultural Adaptation and Validation of Knee Quality of Life 26-Item Questionnaire into Spanish in Patellofemoral Pain.Journal of clinical medicine · 2026Article
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Authors and funding
4 authors.
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No grant is acknowledged in the PubMed record.
Abstract
INTRODUCTION/
objectivesKnee osteoarthritis (OA) is a common condition impacting quality of life by limiting daily activities. This study aimed to translate and culturally adapt the Knee Quality of Life 26-item (KQoL-26) questionnaire into Turkish and assess its validity and reliability in individuals with knee OA.
methodThe study included 182 patients with primary knee OA. Its comprehensibility was piloted with 10 patients and 10 healthcare professionals. Patients provided demographic and clinical information and completed the Short Form-36 (SF-36), Knee Injury and Osteoarthritis Outcome Score (KOOS), Western Ontario and McMaster University Osteoarthritis Index (WOMAC), and the Turkish KQoL-26. SF-36, KOOS, and WOMAC assessed the construct validity of the KQoL-26. To measure test-retest reliability, the KQoL-26 was re-administered after three days.
resultsThe KQoL-26 demonstrated high internal consistency with a Cronbach's α of 0.965. Subscale α values were 0.945 (physical functioning), 0.915 (activity limitations), and 0.903 (emotional functioning). Test-retest analysis revealed Intraclass Correlation Coefficient (ICC) values from 0.791 to 0.954 for items and 0.948 to 0.963 for subscales. The KQoL-26 scores correlated positively with SF-36 and KOOS and negatively with WOMAC (p < 0.001).
conclusionThe Turkish KQoL-26 is a valid and reliable tool for assessing knee-related quality of life in knee OA patients. Key Points • The results of this study concluded that the Turkish version of the KQoL-26 is a valid and reliable tool for assessing the quality of life in patients with knee OA. • The Turkish version of the KQoL-26, being a practical and versatile tool for assessing quality of life, demonstrates its applicability in both clinical practice and academic research. • The Turkish version of the KQoL-26, showing similarity to commonly used scales in OA assessment, can be used as an alternative to these questionnaires.
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