Ye, W, Hackett, S, Vandevelde, C et al. (3 more authors) (2020) Comparing the visual analogue scale (VAS) and the numerical rating scale (NRS) in patient reported outcomes in psoriatic arthritis. The Journal of Rheumatology. jrheum.200. ISSN 0315-162X
Abstract
Objective: Patient self-report scales are invaluable in psoriatic arthritis (PsA), as they allow physicians to rapidly assess patient perspectives of disease activity. We aimed to assess the agreement of the visual analogue scale (VAS), a 100 mm horizontal line, and the numerical rating scale (NRS), a 21-point scale ranging from 0 to 10 in increments of 0.5, in patients with PsA.
Methods: Data were collected prospectively across three UK hospital trusts from 2018-2019. All patients completed the VAS and NRS for pain, arthritis, skin psoriasis, and global disease activity. A subset completed an identical pack one week later. Demographic and clinical data were also collected. Agreement was assessed using medians and the Bland-Altman method. Intraclass correlation coefficients (ICC) were used to assess test-retest reliability. Spearman’s rank correlation coefficients were used to assess dependency between scale scores and clinical parameters.
Results: 210 patients completed the study; one withdrew consent, thus 209 were analysed. For pain, arthritis, skin psoriasis and global disease activity, the difference between the VAS and NRS mostly lay within 1.96 SD of the mean, suggesting reasonable agreement between the two scales. 64.1% patients preferred the NRS. The ICCs demonstrate excellent test-retest reliability for both VAS and NRS. Higher VAS and NRS scores were associated with increased tender/swollen joint count, poorer functional status and greater life impact.
Conclusion: The VAS and NRS show reasonable agreement in key patient reported outcomes in PsA. Results from both scales are correlated with disease severity and life impact.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 The Journal of Rheumatology. This is an author produced version of an article published in The Journal of Rheumatology. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Institute of Rheumatology & Musculoskeletal Medicine (LIRMM) (Leeds) > Inflammatory Arthritis (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 05 Jan 2021 11:02 |
Last Modified: | 01 Dec 2021 01:38 |
Status: | Published online |
Publisher: | Journal of Rheumatology |
Identification Number: | 10.3899/jrheum.200928 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:169302 |