Thus, we proposed an 11-items WOMAC short form.
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. Patients received the questionnaires by mailing, and two reminder letters were sent to patients who had not replied the questionnaire. Patients completed the WOMAC and the Short Form (SF)-36 questionnaires before THR and 6 months afterward. METHODS: Prospective observational study of two independent cohorts (788 and 445 patients, respectively). 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).
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