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Cross-cultural adaptation, reliability, internal consistency and validation of the Arabic version of the knee injury and osteoarthritis outcome score (KOOS) for Egyptian people with knee injuries



Article type: Published article

Abstract

OBJECTIVE: The objective of this study was to cross-culturally adapt and validate the Arabic version of the Knee injury and Osteoarthritis Outcome Score (KOOS) among a sample from Egyptian populace. METHODS: This version was obtained with forward/backward translations and pre-testing. The Arabic KOOS, the RAND-36-Item Health Survey (RAND-36) questionnaire, visual analogue scales (VAS) of pain and a form for patient characteristics were used. Test-retest reliability and internal consistency were assessed, using Intraclass Correlation Coefficient (ICC) and Cronbach's alpha, respectively. The dimensionality was assessed, by factor analysis and construct validity by using a priori hypothesized correlations with the RAND-36. Ceiling/floor effects and measurement error were tested as well. RESULTS: No major difficulties were encountered during the translation and pre-testing stages. Reliability was acceptable with Cronbach's alpha coefficients between 0.80 and 0.95, and ICCs ranging from 0.88 to 0.96 for the KOOS subscales. Factor analysis was performed on the whole study population and the results indicated that all items of the Arabic KOOS loaded on one factor, which ranged from 0.34 to 0.89. Construct validity was supported by the confirmation of all priori hypotheses by the presence of higher correlations between similar constructs than between dissimilar constructs of the KOOS subscales, RAND-36 subscales and VAS. Floor/ceiling effects were considered not to be present. CONCLUSION: The Arabic KOOS is a reliable and valid instrument that can be self-administered to Egyptian patients and provides a valuable basis for research and clinical projects focussing on patient-based assessments in anterior cruciate ligament (ACL), meniscus and combined injures of knee. Further studies to validate the Arabic version of the KOOS using females and elderly population with different knee problems and various educational levels in other Arabic counties are highly recommended.


Full citation

Almangoush A, Herrington L, Attia I, Jones R, Aldawoudy A, Abdul Aziz A, et al. Cross-cultural adaptation, reliability, internal consistency and validation of the Arabic version of the knee injury and osteoarthritis outcome score (KOOS) for Egyptian people with knee injuries. Osteoarthritis and cartilage. 2013;21(12):1855-64.


Methodology

Methods Condition Gender Age Country Setting Sample size
people with knee injuries Both 18 - older Egypt
Healthcare Facility 129

Number of items

42 items

Training

Measure does not require training

Required time

6-30 min

Access measure

a.a.almangoush@edu.salford.ac.uk






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Articles last updated: December 2020