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Measuring fatigue in Parkinsons disease: A psychometric study of two brief generic fatigue questionnaires
Department of Health Sciences, Lund University, Sweden.
Department of Neurology, University Hospital, Lund, Sweden.
Department of Neurology, Swedish Institute for Health Science, Lund University, Sweden.
Department of Neurological Rehabilitation, Karolinska University Hospital Huddinge, Stockholm, Sweden.
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2006 (English)In: Journal of Pain and Symptom Management, ISSN 0885-3924, E-ISSN 1873-6513, Vol. 32, no 5, 420-432 p.Article in journal (Refereed) Published
Abstract [en]

This study evaluated and compared the measurement properties of the 13-item Functional Assessment of Chronic Illness Therapy-Fatigue Scale (FACIT-F) and the 9-item Fatigue Severity Scale (FSS) in 118 consecutive Parkinsons disease (PD) patients, using traditional and Rasch measurement methodologies. Both questionnaires exhibited excellent data quality and reliability (coefficient alpha greater than= 0.9), and acceptable rating scale functionality, and both discriminated between fatigued and nonfatigued patients. factor and Rasch analyses provided general support for unidimensionality of both FACIT-F and FSS, although they do not appear to measure identical aspects of fatigue. No signs of differential item functioning (DIF) were found for the FACIT-F, whereas potential age DIF, was detected for two FSS items. These results support the measurement validity of both questionnaires in PD, although the FACIT-F displayed better measurement precision and modest psychometric advantages over the FSS. Availability of psychometrically sound fatigue measures that are applicable across disorders provides a sound basis for advancing the understanding of this common and distressing complaint.

Place, publisher, year, edition, pages
2006. Vol. 32, no 5, 420-432 p.
Keyword [en]
fatigue; Parkinsons disease; questionnaires; reliability; validity
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-53487DOI: 10.1016/j.jpainsymman.2006.05.021OAI: diva2:290027
Available from: 2010-01-25 Created: 2010-01-25 Last updated: 2013-11-19Bibliographically approved

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NeurologyFaculty of Health SciencesDepartment of Neuroscience and Locomotion
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Journal of Pain and Symptom Management
Medical and Health Sciences

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