Cross-cultural adaptation and validation reliability, validity of the Japanese version of the Hip disability and Osteoarthritis Outcome Score (HOOS) in patients with hip osteoarthritis

摘要

Introduction and summary Hip osteoarthritis (OA) is one of the leading causes of chronic disability worldwide and has a significant impact on patients' health-related quality of life (HRQpL). To assess major factors of patients' limitations, the Hip disability and Osteoarthritis Outcome Score (HOOS) has been developed in English to improve the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) for the use in patients with higher physical demands. As no Japanese version of the HOOS was available, the goal of the study was to cross-culturally adapt and validate the HOOS for its use in a large number of Japanese patients with hip OA based on the guidelines of Guillemin and Beaton . Acceptable internal consistency and good test-retest reliability was achieved. As hypothesized, convergent validity was found for all HOOS domains with the Oxford Hip Score (OHS), with the 36-item Short Form (SF-36) subscales for Physical Functioning (PF) and Bodily Pain (BP), and with the subscale for Acceptance of the Nottingham Adjustment Scale Japanese version hip edition (NAS-J-HIP). Divergent validity was also found for the HOOS subscales and SF-36 Role Emotional and Social Functioning subscales. The responsiveness was high for all subscales in OA patients after total hip arthroplasty (THA) (n = 21). Overall, the Japanese HOOS questionnaire is valid and reliable for use in Japanese patients with symptomatic hip OA.