Validity and reliability testing of the Quality of Life Scale, Swedish version in women with fibromyalgia - statistical analyses

One consequence of constant widespread pain is a low quality of life. The purpose of the study was to examine whether the Quality of Life Scale, Swedish version (QOLS‐S), regarded as a generic quality‐of‐life instrument, is a reliable and valid instrument for use in women with fibromyalgia (FM). Wom...

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Bibliographic Details
Published in:Scandinavian journal of caring sciences 2005-03, Vol.19 (1), p.64-70
Main Authors: Liedberg, Gunilla M., Burckhardt, Carol S., Henriksson, Chris M.
Format: Article
Language:English
Subjects:
Adult
Assessment
Construct validity
Educational Status
Employment
Factor analysis
Factor Analysis, Statistical
Family
Female
Fibromyalgia
Fibromyalgia - epidemiology
Fibromyalgia - physiopathology
Fibromyalgia - psychology
Humans
MEDICIN
MEDICINE
Middle Aged
Nursing
Quality of Life
Reliability
Reproducibility of Results
Scales
Sweden - epidemiology
Swedish version
validity
Women
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Summary:One consequence of constant widespread pain is a low quality of life. The purpose of the study was to examine whether the Quality of Life Scale, Swedish version (QOLS‐S), regarded as a generic quality‐of‐life instrument, is a reliable and valid instrument for use in women with fibromyalgia (FM). Women with FM (n = 113) contributed data on the QOLS‐S and other standardized instrument at three points in time. Internal consistency reliability estimates ranged from 0.89 to 0.92. Convergent construct validity was indicated by moderate agreement with a global life satisfaction question. Discriminant construct validity was denoted by low correlations with the physical functioning subscale of the SF‐36. In a factor analysis three factors emerged: ‘personal and social well‐being’, ‘relations with others’ and ‘active participation’. A few of the items have high cross‐loadings, and the instrument could be improved by rewording those items to more closely reflect one specific factor. Overall, these results provide evidence that the QOLS‐S has acceptable validity and reliability for use in women with FM.
ISSN:0283-9318
1471-6712
1471-6712
DOI:10.1111/j.1471-6712.2004.00311.x