TAILIEUCHUNG - báo cáo khoa học:" Validation of a proposed WOMAC short form for patients with hip osteoarthritis"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Validation of a proposed WOMAC short form for patients with hip osteoarthritis | Bilbao et al. Health and Quality of Life Outcomes 2011 9 75 http content 9 1 75 HEALTH AND QUALITY OF LIFE OUTCOMES RESEARCH Open Access Validation of a proposed WOMAC short form for patients with hip osteoarthritis Amaia Bilbao1 José M Quintana2 Antonio Escobar3 Carlota Las Hayas2 and Miren Orive2 Abstract Background The aims of this study were to propose a Spanish Western Ontario and McMaster Universities Osteoarthritis Index WOMAC short form based on previously shortened versions and to study its validity reliability and responsiveness for patients with hip osteoarthritis undergoing total hip replacement THR . Methods Prospective observational study of two independent cohorts 788 and 445 patients respectively . Patients completed the WOMAC and the Short Form SF -36 questionnaires before THR and 6 months afterward. Patients received the questionnaires by mailing and two reminder letters were sent to patients who had not replied the questionnaire. Based on two studies from the literature we selected the two shortened domains the pain domain composed of three items and the function domain composed of eight items. Thus we proposed an 11-items WOMAC short form. A complete validation process was performed including confirmatory factor analysis CFA and Rasch analysis and a study of reliability responsiveness and agreement measured by the Bland-Altman approach. Results The mean age was about 69 years and about 49 were women. CFA analyses confirmed the two-factor model. The pain and function domains fit the Rasch model. Stability was supported with similar results in both cohorts. Cronbach s alpha coefficients were high and . The highest correlations in convergent validity were found with the bodily pain and physical function SF-36 domains. Significant differences were found according to different pain and function severity scales supporting known-groups validity. Responsiveness parameters showed large changes effect sizes and . Agreement

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