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.
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Research
Barbara Seebacher
Clinical Department of Neurology Medical University of Innsbruck, Austria
Corresponding Author
ORCiD: https://orcid.org/0000-0001-5699-9077
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background
Self-efficacy refers to people’s beliefs in their ability to perform relevant activities to achieve personal goals. In people with multiple sclerosis (PwMS), self-efficacy has been shown to significantly impact health-related behaviour. So far, a validated German language self-efficacy scale for PwMS is missing. Therefore, the aims his study were to translate the Unidimensional Self-Efficacy Scale for Multiple Sclerosis (USE-MS) into German, establish face and content validity and cultural adaption of the German version for PwMS in Austria. Further aims were to validate the German USE-MS (USE-MS-G) in PwMS using Rasch analysis.
Methods
Formal permission to translate and validate the USE-MS was received from the scale developers. Following guidelines for translation and validation of questionnaires and applying Bandura’s concept of self-efficacy, the USE-MS was forward-backward translated, and content and face validity established. Cultural adaption for Austria was performed using cognitive interviews of 30 PwMS. The validation by Rasch analysis, of the final USE-MS-G involved 309 PwMS with minimal to severe disability using scales for resilience, general self-efficacy, anxiety and depression, MS fatigue and health-related quality of life. Re-test was conducted within 14–21 days after the initial test. Data were also pooled with an historic English dataset.
Results
Using a bi-factor solution, excellent external and construct validity, internal consistency, person separation reliability, test-retest reliability and fit to the Rasch model was demonstrated. The USE-MS-G was shown to be unidimensional, well-targeted and free from differential item functioning. Pooling of the English and German datasets confirmed equivalence of the two language versions.
Conclusion
The USE-MS-G is a robust, valid and reliable scale to assess self-efficacy in PwMS. Rasch model fit given, an interval scale transformation table is available for clinical settings and research.
Trial registration:
ISRCTN Registry; ISRCTN14843579; prospectively registered on 02. 01. 2019; http://www.isrctn.com/ISRCTN14843579
Keywords
Multiple Sclerosis, Self-Efficacy, Patient Reported Outcome Measures, Austria, Cross-Cultural Comparison, Validation Studies as Topic
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This is a list of supplementary files associated with this preprint. Click to download.
- AdditionalFile213082020.docx
Additional file 2Differential item functioning analyses
- AdditionalFile113082020.docx
Additional file 1Item characteristic curves
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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
Barbara Seebacher
Clinical Department of Neurology Medical University of Innsbruck, Austria
Corresponding Author
ORCiD: https://orcid.org/0000-0001-5699-9077
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 18 Aug, 2020
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Health Economics & Outcomes Research
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background
Self-efficacy refers to people’s beliefs in their ability to perform relevant activities to achieve personal goals. In people with multiple sclerosis (PwMS), self-efficacy has been shown to significantly impact health-related behaviour. So far, a validated German language self-efficacy scale for PwMS is missing. Therefore, the aims his study were to translate the Unidimensional Self-Efficacy Scale for Multiple Sclerosis (USE-MS) into German, establish face and content validity and cultural adaption of the German version for PwMS in Austria. Further aims were to validate the German USE-MS (USE-MS-G) in PwMS using Rasch analysis.
Methods
Formal permission to translate and validate the USE-MS was received from the scale developers. Following guidelines for translation and validation of questionnaires and applying Bandura’s concept of self-efficacy, the USE-MS was forward-backward translated, and content and face validity established. Cultural adaption for Austria was performed using cognitive interviews of 30 PwMS. The validation by Rasch analysis, of the final USE-MS-G involved 309 PwMS with minimal to severe disability using scales for resilience, general self-efficacy, anxiety and depression, MS fatigue and health-related quality of life. Re-test was conducted within 14–21 days after the initial test. Data were also pooled with an historic English dataset.
Results
Using a bi-factor solution, excellent external and construct validity, internal consistency, person separation reliability, test-retest reliability and fit to the Rasch model was demonstrated. The USE-MS-G was shown to be unidimensional, well-targeted and free from differential item functioning. Pooling of the English and German datasets confirmed equivalence of the two language versions.
Conclusion
The USE-MS-G is a robust, valid and reliable scale to assess self-efficacy in PwMS. Rasch model fit given, an interval scale transformation table is available for clinical settings and research.
Trial registration:
ISRCTN Registry; ISRCTN14843579; prospectively registered on 02. 01. 2019; http://www.isrctn.com/ISRCTN14843579
Figure 1
Figure 2
Figure 3
Figure 4
This is a list of supplementary files associated with this preprint. Click to download.
- AdditionalFile213082020.docx
Additional file 2Differential item functioning analyses
- AdditionalFile113082020.docx
Additional file 1Item characteristic curves
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