کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
949467 926753 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Psychometric evaluation of the Revised Illness Perception Questionnaire (IPQ-R) in cancer patients: Confirmatory factor analysis and Rasch analysis
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی روانپزشکی بیولوژیکی
پیش نمایش صفحه اول مقاله
Psychometric evaluation of the Revised Illness Perception Questionnaire (IPQ-R) in cancer patients: Confirmatory factor analysis and Rasch analysis
چکیده انگلیسی

ObjectiveTo provide new insights into the psychometrics of the revised Illness Perception Questionnaire (IPQ-R) in cancer patients. To undertake, for the first time using data from breast, colorectal and prostate cancer patients, a confirmatory factor analysis (CFA) to assess the validity of the IPQ-R's core seven-factor structure. Also, for the first time in any illness group, to undertake Rasch analysis to explore the extent to which the IPQ-R factors form unidimensional scales, with linear measurement properties and no Differential Item Functioning (DIF).MethodsPatients with potentially curable breast, colorectal or prostate cancer, within 6 months post-diagnosis, completed the IPQ-R online (N = 531). CFA was conducted, including multi-sample analysis, and for each IPQ-R factor fit to the Rasch model was assessed by examining, amongst other things, item fit, DIF and unidimensionality.ResultsThe CFA showed a moderate fit of the data to the IPQ-R model, and stability across diagnosis, although fit was significantly improved following the removal of selected items. All seven factors achieved fit to the Rasch model, and exhibited unidimensionality and minimal DIF, although in most cases this was after some item rescoring and/or deletion. In both analyses, IPQ-R items 12, 18 and 24 were indicated as misfitting and removed.ConclusionGiven the rigorous standard of Rasch measurement, and the generic nature of the IPQ-R, it stood up well to the demands of the Rasch model in this study. Importantly, the results show that with some relatively minor, pragmatic modifications the IPQ-R could possess Rasch-standard measurement in cancer patients.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Psychosomatic Research - Volume 75, Issue 6, December 2013, Pages 556–562
نویسندگان
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