Cross-cultural adaptation and validation of the Vietnamese version of the Knee Injury and Osteoarthritis Outcome Score (KOOS) in patients with knee osteoarthritis
Background: Knee osteoarthritis (KOA) is common in Vietnam, affecting about 34 % of individuals over 40 years of age. The Knee Injury and Osteoarthritis Outcome Score (KOOS) is an internationally recognized patient-reported outcome used to assess the impact of KOA but it is not yet available in Viet...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-04-01
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| Series: | Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214687325000111 |
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| Summary: | Background: Knee osteoarthritis (KOA) is common in Vietnam, affecting about 34 % of individuals over 40 years of age. The Knee Injury and Osteoarthritis Outcome Score (KOOS) is an internationally recognized patient-reported outcome used to assess the impact of KOA but it is not yet available in Vietnamese. Objective: This study aimed to translate the KOOS into Vietnamese and assess the psychometric properties of the translation (KOOS-V). Methods: The translation process involved forward/back translation, expert review and cognitive interviews for pretesting. Content validity was assessed by seven experts using the Content validity Index (CVI). A sample of 133 Vietnamese KOA patients (mean age: 63.7 years, 83 % female) completed the KOOS-V, Short Form 36 Health Survey (SF-36) and Numeric Pain Rating Scale (NPRS), and 67 of them were re-assessed after 5–8 days. Psychometric analyses included internal consistency, test-retest reliability, construct validity and cross-cultural comparison of KOOS-V subscales. Results: KOOS-V exhibited excellent content validity (CVI = 0.86–1.00), satisfactory internal consistency (Cronbach's α = 0.70–0.98) and good to excellent test-retest reliability (ICC = 0.77–0.90). Construct validity was confirmed by moderate to strong correlations with SF-36 Physical Functioning (Spearman's ρ = 0.66 to 0.82) and moderate correlations with NPRS (ρ = −0.49 to −0.62). The cross-cultural comparison showed that the KOOS subscales in Vietnam presents the same challenge as in other cultures. Conclusions: The KOOS-V is a reliable, valid tool for assessing the functional impact of KOA in Vietnamese patients, contributing to its broader use worldwide in clinical and research settings. |
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| ISSN: | 2214-6873 |