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Validity and reliability of the Swedish version of the Self-Efficacy for Managing Chronic Disease scale for individuals with systemic sclerosis

Mattsson, M. ; Sandqvist, G. LU orcid ; Hesselstrand, R. LU ; Olsson, D. ; Kwakkenbos, L. ; Nordin, A. and Boström, C. (2022) In Scandinavian Journal of Rheumatology 51(2). p.110-119
Abstract

ObjectiveTo investigate aspects of validity and reliability of the Swedish version of the Self-Efficacy for Managing Chronic Disease (SEMCD-Swe) scale in systemic sclerosis (SSc).Method: A forward–backward translation procedure was used. Content validity was assessed through interviews with 11 people with SSc and 10 healthcare professionals. Construct validity, internal consistency, test–retest reliability, and floor and ceiling effects were evaluated in 104 SSc patients.Results: The content validity of the SEMCD-Swe was interpreted as satisfactory, but some adjustments were made to increase the understanding. Confirmatory factor analysis supported a single-factor structure. Moderate to strong correlations between the SEMCD-Swe and... (More)

ObjectiveTo investigate aspects of validity and reliability of the Swedish version of the Self-Efficacy for Managing Chronic Disease (SEMCD-Swe) scale in systemic sclerosis (SSc).Method: A forward–backward translation procedure was used. Content validity was assessed through interviews with 11 people with SSc and 10 healthcare professionals. Construct validity, internal consistency, test–retest reliability, and floor and ceiling effects were evaluated in 104 SSc patients.Results: The content validity of the SEMCD-Swe was interpreted as satisfactory, but some adjustments were made to increase the understanding. Confirmatory factor analysis supported a single-factor structure. Moderate to strong correlations between the SEMCD-Swe and Scleroderma Health Assessment Questionnaire; Multidimensional Assessment of Fatigue; Patient Health Questionnaire-8 (rs = −0.4 to −0.7), and RAND-36 subscales (rs = 0.5 to 0.7) were found. Weak correlations were found between SEMCD-Swe and modified Rodnan skin score; and disease severity of peripheral vascular and lung (rs = −0.1 to −0.2) and kidney (rs = 0.1) systems (Medsger severity scale). Cronbach’s alpha was sufficient (0.85) and corrected item-to-total correlations were good (≥ 0.50). The intraclass correlation coefficient for the total score was sufficient (0.82). No floor or ceiling effects were found.Conclusion: Support for construct validity was indicated, as the SEMCD-Swe in SSc show a single-factor structure and is more strongly associated with pain, fatigue, depressive symptoms, interferences with daily activities, disability, and quality of life than with disease severity. Our results also indicate support for content validity and reliability. However, the responsiveness of the SEMCD-Swe needs to be tested.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Scandinavian Journal of Rheumatology
volume
51
issue
2
pages
110 - 119
publisher
Taylor & Francis
external identifiers
  • scopus:85110449037
  • pmid:34251963
ISSN
0300-9742
DOI
10.1080/03009742.2021.1917142
language
English
LU publication?
yes
id
215749f1-6c28-4d7a-9833-c8462b63a477
date added to LUP
2021-09-07 10:48:05
date last changed
2024-06-15 15:52:54
@article{215749f1-6c28-4d7a-9833-c8462b63a477,
  abstract     = {{<p>ObjectiveTo investigate aspects of validity and reliability of the Swedish version of the Self-Efficacy for Managing Chronic Disease (SEMCD-Swe) scale in systemic sclerosis (SSc).Method: A forward–backward translation procedure was used. Content validity was assessed through interviews with 11 people with SSc and 10 healthcare professionals. Construct validity, internal consistency, test–retest reliability, and floor and ceiling effects were evaluated in 104 SSc patients.Results: The content validity of the SEMCD-Swe was interpreted as satisfactory, but some adjustments were made to increase the understanding. Confirmatory factor analysis supported a single-factor structure. Moderate to strong correlations between the SEMCD-Swe and Scleroderma Health Assessment Questionnaire; Multidimensional Assessment of Fatigue; Patient Health Questionnaire-8 (r<sub>s</sub> = −0.4 to −0.7), and RAND-36 subscales (r<sub>s</sub> = 0.5 to 0.7) were found. Weak correlations were found between SEMCD-Swe and modified Rodnan skin score; and disease severity of peripheral vascular and lung (r<sub>s</sub> = −0.1 to −0.2) and kidney (r<sub>s</sub> = 0.1) systems (Medsger severity scale). Cronbach’s alpha was sufficient (0.85) and corrected item-to-total correlations were good (≥ 0.50). The intraclass correlation coefficient for the total score was sufficient (0.82). No floor or ceiling effects were found.Conclusion: Support for construct validity was indicated, as the SEMCD-Swe in SSc show a single-factor structure and is more strongly associated with pain, fatigue, depressive symptoms, interferences with daily activities, disability, and quality of life than with disease severity. Our results also indicate support for content validity and reliability. However, the responsiveness of the SEMCD-Swe needs to be tested.</p>}},
  author       = {{Mattsson, M. and Sandqvist, G. and Hesselstrand, R. and Olsson, D. and Kwakkenbos, L. and Nordin, A. and Boström, C.}},
  issn         = {{0300-9742}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{110--119}},
  publisher    = {{Taylor & Francis}},
  series       = {{Scandinavian Journal of Rheumatology}},
  title        = {{Validity and reliability of the Swedish version of the Self-Efficacy for Managing Chronic Disease scale for individuals with systemic sclerosis}},
  url          = {{http://dx.doi.org/10.1080/03009742.2021.1917142}},
  doi          = {{10.1080/03009742.2021.1917142}},
  volume       = {{51}},
  year         = {{2022}},
}