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Validity of the work productivity and activity impairment questionnaire - general health version in patients with rheumatoid arthritis |
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| Authors: | Wei Zhang Nick Bansback Annelies Boonen Adam Young Amitabh Singh Aslam H Anis |
| Institution: | (1) Centre for Health Evaluation and Outcome Sciences, St Paul's Hospital, 620-1081, Burrard Street, Vancouver, BC V6Z 1Y6, Canada;(2) School of Population and Public Health, University of British Columbia, 5804, Fairview Avenue, Vancouver, BC V6T 1Z3, Canada;(3) Department of Internal Medicine, Division of Rheumatology, University Hospital Maastricht and Caphri Research Institute, 6229, P Debyelaan 25, HX Maastricht, BC V6T 1Z3, The Netherlands;(4) Department of Rheumatology, St Albans City Hospital, 6229, Waverley Road, St Albans, Herts, AL3 5PN, UK;(5) Inflammation Market Access, Pfizer, Inc, 6229, 500 Arcola Road, Dock E-4303, Collegeville, PA 19426, USA |
| Abstract: | IntroductionThe Work Productivity and Activity Impairment (WPAI) questionnaire is a well validated instrument to measure impairments in work and activities. However, its validation among patients with rheumatoid arthritis (RA) has not been well established. The present study's purpose is to evaluate the construct validity of the WPAI-general health version among RA patients and its ability to differentiate between RA patients with varying health status. |
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