Using Rasch analysis to evaluate the validity of the diabetes-specific version of the Illness Perception Questionnaire-Revised

Gwyneth Rees, Ecosse L. Lamoureux, Jing Xie, Bonnie A. Sturrock, Eva K. Fenwick

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8 Citations (Scopus)

Abstract

This study used Rasch analysis to examine the psychometric validity of the Illness Perception Questionnaire-Revised to assess beliefs about diabetes in 470 participants with Type 2 diabetes and 71 participants with Type 1 diabetes. All Illness Perception Questionnaire-Revised scales had psychometric issues, which included poorly utilised response categories, poor scale precision and multidimensionality. Following re-engineering, only four of the eight scales (Consequences, Illness coherence, Timeline cyclical and Emotional representations) were psychometrically adequate according to the Rasch model. The diabetes-specific version of the Illness Perception Questionnaire-Revised provides suboptimal assessment of beliefs held by patients with diabetes.

Original languageEnglish
Pages (from-to)1340-1356
Number of pages17
JournalJournal of Health Psychology
Volume20
Issue number10
DOIs
Publication statusPublished - 9 Oct 2015
Externally publishedYes

Keywords

  • diabetes
  • illness perception
  • psychometric evaluation
  • quantitative methods
  • Rasch analysis

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