Gaceta sanitaria
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The aim of this prospective study was to evaluate the validity, reliability and responsiveness of the Spanish version of the 7-item short-form of the function dimension of the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC). ⋯ The Spanish 7-item short form of the WOMAC function dimension is valid, reliable and responsive for patients with total joint replacement. The use of this version will reduce the burden on patients in both clinical studies and clinical practice.