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Development of a patient-reported outcome measure for the foot affected by rheumatoid arthritis

Walmsley, Steven, Ravey, Michael, Graham, Andrea, Teh, LeeSuan and Williams, Anita 2012, 'Development of a patient-reported outcome measure for the foot affected by rheumatoid arthritis' , Journal of Clinical Epidemiology, 65 , pp. 413-422.

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Abstract

Objective: To develop an idiographic and nomothetic patient-reported outcome measure (PROM) for the assessment and evaluation of patients with feet affected by rheumatoid arthritis (RA). Study Design and Setting: The development of the Salford Rheumatoid Arthritis Foot Evaluation (SAFE) Instrument PROM was divided into four stages: establishment of the PROM’s conceptual basis and content generation, following a descriptive phenomenological study; clinimetric instrument development; instrument pretesting, involving expert reviews and cognitive interviews; and demonstration of instrument measurement properties, including convergent validity and testeretest reliability of the nomothetic scale. Results: A total of 123 items were initially generated for the SAFE, with 25 of them clinimetrically selected for nomothetic scale(SAFE-Part A) and 80 items initially included in the idiographic scale (SAFE-Part B). The pretesting strategy proved effective for improving and refining the SAFE, with the final draft consisting of 19 items in Part A and 42 items in Part B. The SAFE-Part A has strong evidence for convergent validity and testeretest reliability. Conclusion: The SAFE features a nomothetic and idiographic assessment strategy that, with further development, will prove to be a valuable tool for clinicians involved in managing the foot health problems associated with RA.

Item Type: Article
Themes: Health and Wellbeing
Schools: Colleges and Schools > College of Health & Social Care > School of Health Sciences > Centre for Health Sciences Research
Journal or Publication Title: Journal of Clinical Epidemiology
Publisher: Elsevier
Refereed: Yes
ISSN: 0895-4356
Depositing User: AE Williams
Date Deposited: 23 Feb 2012 10:39
Last Modified: 21 Nov 2014 10:23
URI: http://usir.salford.ac.uk/id/eprint/20665

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