Background: The Brief Illness Perception Questionnaire (BIPQ) is used as an instrument to assess the patients’ perception of illness. Illness perceptions of patients vary across different conditions. The psychometric properties of the Persian version of BIPQ have not been adequately evaluated. The aim of this study was to determine the reliability and validity of the Persian BIPQ in patients with chronic non-specific low back pain (LBP).Methods: In this cross-sectional study, 116 patients with chronic non-specific LBP with a mean (standard deviation) age of 36.4 years (10.7) participated. Fifty patients reexamined after 10-12 days for test-retest reliability. Internal consistency reliability, construct validity, concurrent criterion validity, and structural validity were evaluated. The concurrent validity was examined by using the Short Form -36 Health Survey.Results: There were no floor and ceiling effects. The Cronbach’s alpha for the total score was 0.9. The intraclass correlation coefficient (ICC) for test-retest reliability was 0.9. The standard error of measurement and the minimal detectable change was found 3.26 and 9.04, respectively. The convergent correlations confirmed the construct validity. The concurrent criterion validity was demonstrated by significant negative correlations with the SF-36. The Exploratory Factor Analysis produced the two factors (Emotional illness representations and Cognitive ıllness representations) with an eigenvalue > 1.0 that jointly accounted for 58.86% of the total variance.Conclusions: The Persian BIPQ is a reliable and valid two-factor instrument and can be used for assessing illness perception in patients with chronic non-specific LBP.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.