Psychometric qualities of a brief self-rated fatigue measure: The Fatigue Assessment Scale

H.J. Michielsen, J. de Vries, G.L. van Heck

    Research output: Contribution to journalArticleScientificpeer-review

    261 Citations (Scopus)
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    Abstract

    Objective: The main aim of this study was to examine the dimensionality and psychometric qualities of a new 10-item fatigue measure, the Fatigue Assessment Scale (FAS). Methods: As part of a longitudinal study, the respondents, all workers with at least 20 working hours per week, completed the FAS, four related fatigue measures, a depression questionnaire, and an emotional stability scale. Results: The FAS had a high internal consistency. The pattern of correlations and factor analysis showed good convergent and divergent validity. The FAS correlated strongly with the other fatigue scales. In a factor analysis of the five fatigue questionnaires, the FAS had the highest factor loading on a clear one-factor solution. Moreover, factor analyses revealed that fatigue, on the one hand, and depression and emotional stability, on the other hand, are separate constructs. Finally, it was shown that 8 out of the 10 FAS items were unbiased concerning gender; two had a uniform bias. Conclusions: The FAS represents a potentially valuable assessment instrument with promising internal consistency reliability and validity. Gender bias in the FAS does not have consequences for use of the FAS.
    Original languageEnglish
    Pages (from-to)345-352
    JournalJournal of Psychosomatic Research
    Volume54
    Issue number4
    Publication statusPublished - 2003

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