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Research article
Noureddin Nakhostin Ansari
Tehran University of Medical Sciences
Corresponding Author
ORCiD: https://orcid.org/0000-0003-2742-2273
License:
This work is licensed under a CC BY 4.0 License. Read Full License
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.
Keywords
Brief Illness Perception Questionnaire, Low Back Pain, Reliability, Validity
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A new preprint design is coming!
We have improved readability, clarity, accessibility, and opportunities for engagement.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Research article
Noureddin Nakhostin Ansari
Tehran University of Medical Sciences
Corresponding Author
ORCiD: https://orcid.org/0000-0003-2742-2273
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 06 May, 2020
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
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.
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