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 language | English |
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Pages (from-to) | 1340-1356 |
Number of pages | 17 |
Journal | Journal of Health Psychology |
Volume | 20 |
Issue number | 10 |
DOIs | |
Publication status | Published - 9 Oct 2015 |
Externally published | Yes |
Keywords
- diabetes
- illness perception
- psychometric evaluation
- quantitative methods
- Rasch analysis