Different Wording of the Patient Global Visual Analogue Scale (PG-VAS) Affects Rheumatoid Arthritis Patients' Scoring and the Overall Disease Activity Score (DAS28): A Cross-Sectional Study

Tracy French, Sarah Hewlett, John Kirwan, Tessa Sanderson

Research output: Contribution to journalArticle (Academic Journal)peer-review

23 Citations (Scopus)

Abstract

OBJECTIVE: The Disease Activity Score in 28 joints (DAS28) is a key measure in clinical practice and clinical trials. There are at least five different versions of the 'Patient Global' Visual Analogue Scale (PG-VAS) being used in the DAS28. The developers suggested that the PG-VAS can be an assessment of global health or disease activity, but did not specify the wording of the question. There is no consensus on what the PG-VAS is intended to capture, and the different words and phrases have not been evaluated. The aim of this study was to test if phrasing affects PG-VAS scores and hence yields different results for the DAS28. METHODS: Fifty patients with rheumatoid arthritis taking biologic agents in a rheumatology outpatient department completed a self-administered questionnaire containing five versions of the 100 mm PG-VAS. RESULTS: All PG-VAS versions correlated strongly with each other (rho = 0.67-0.87, p 
Original languageEnglish
JournalMusculoskeletal Care
Early online date4 Feb 2013
DOIs
Publication statusPublished - 2013

Bibliographical note

Early View - published online before appearing in an issue. Feb 2013

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