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- W4247564344 abstract "Abstract Background Little attention has been paid to customising fatigue questionnaires for patients with Substance Use Disorders (SUDs). The present study aims to validate and shorten the nine-item Fatigue Severity Scale (FSS-9) and Visual Analogue Fatigue Scale (VAFS) for use with this population.MethodsWe used data from a nested cohort with annual health assessments with responses on the FSS-9 and VAFS. During the period 2016–2020, 917 health assessments were collected from 655 patients with SUD in Bergen and Stavanger, Norway. A total of 225 patients answered the health assessment at least twice. We defined baseline as the first annual health assessment when the health assessments were sorted chronologically per patient. We checked for internal consistency, and we used longitudinal confirmatory factor analysis and linear mixed model analysis to validate and shorten the FSS-9 and VAFS. ResultsThe internal consistency of the FSS-9 was excellent with a Cronbach’s α of 0.94 at baseline and 0.93 at the second annual health assessment. When shortening the FSS-9 to a three-item FSS (FSS-3, items 5–7), the Cronbach’s α was 0.87 at baseline and 0.84 at the second health assessment. The internal consistency was not affected when the VAFS was added to the FSS-9 and the FSS-3. The longitudinal confirmatory factor analysis model between baseline and the second health assessment showed a well-fitting model for the FSS-3 (χ 2 = 13.33, degree of freedom = 8, P = 0.101) with a correlation of r = 0.52 and P < 0.001 between the annual health assessments. The linear mixed model analysis showed equal linear changes at the individual level for the FSS-3 (slope: 0.00, P > 0.05) and FSS-9 (slope: 0.01, P > 0.05) between the health assessments.ConclusionThe ten items (FSS-9 plus VAFS) could be shortened to a three-item FSS with excellent validity and reliability for patients with SUDs. Shortened and validated fatigue scales may be a way to ensure reliable results in this population." @default.
- W4247564344 created "2022-05-12" @default.
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- W4247564344 date "2020-10-19" @default.
- W4247564344 modified "2023-09-29" @default.
- W4247564344 title "Validation of three-item Fatigue Severity Scale for patients with substance use disorder: a cohort study from Norway for the period 2016-2020" @default.
- W4247564344 doi "https://doi.org/10.21203/rs.3.rs-33806/v2" @default.
- W4247564344 hasPublicationYear "2020" @default.
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