• I B de Groot, M Reijman, C B Terwee, S M A Bierma-Zeinstra, M Favejee, E M Roos, and J A N Verhaar.
• Department of Orthopaedics, Erasmus MC, Rotterdam, The Netherlands. i.b.degroot@erasmusmc.nl
• Osteoarthr. Cartil. 2007 Jan 1; 15 (1): 104-9.

IntroductionThe Hip disability and Osteoarthritis Outcome Score (HOOS) was constructed in Sweden; this questionnaire has proved to be valid for persons with hip disability with or without hip osteoarthritis (OA) and with high demands of physical function.ObjectiveThe objective of this study was to evaluate the internal consistency, reliability, construct validity, and floor and ceiling effects of the Dutch version of the HOOS questionnaire.Patients And MethodsAfter translation with a forward/backward protocol, 74 hip arthroplasty patients and 88 hip OA patients filled in the Dutch HOOS, as well as a Short Form-36 (SF-36), an Oxford Hip Score (OHS) and a VAS-pain questionnaire.ResultsThe Dutch version of the HOOS questionnaire achieved excellent scores in all of the clinimetric properties.ConclusionThe Dutch HOOS questionnaire has a good internal consistency and reliability. Moreover, the construct validity is good and no floor and ceiling effects were found. The HOOS is a good instrument for patients with different stadia of hip OA.

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