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Value in health : the journal of the International Society for Pharmacoeconomics and Outcomes Research
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Randomized Controlled Trial
Reliability and Validity of the Work Instability Scale for Rheumatoid Arthritis.
The objective was to evaluate the psychometric properties of the Rheumatoid Arthritis-Work Instability Scale (RA-WIS) in a clinical trial setting. ⋯ These findings provide evidence supporting the reliability, validity, and responsiveness of the RA-WIS for evaluating work disability in patients with RA in a clinical trial setting.