Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-2038
Title: A 7-item version of the fatigue severity scale has better psychometric properties among HIV-infected adults : an application of a Rasch model
Authors : Lerdal, Anners
Kottorp, Anders
Gay, Caryl
Aouizerat, Bradley E.
Portillo, Carmen J.
Lee, Kathryn A.
Published in : Quality of Life Research
Volume(Issue) : 20
Issue : 9
Pages : 1447
Pages to: 1456
Publisher / Ed. Institution : Springer
Issue Date: 2011
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : HIV seropositivity; Psychometrics; Quality of life; Severity of Illness Index
Subject (DDC) : 616: Internal medicine and diseases
Abstract: Purpose: To examine the psychometric properties of the 9-item Fatigue Severity Scale (FSS) using a Rasch model application. Methods: A convenience sample of HIV-infected adults was recruited, and a subset of the sample was assessed at 6-month intervals for 2 years. Socio-demographic, clinical, and symptom data were collected by self-report questionnaires. CD4 T-cell count and viral load measures were obtained from medical records. The Rasch analysis included 316 participants with 698 valid questionnaires. Results: FSS item 2 did not advanced monotonically, and items 1 and 2 did not show acceptable goodness-of-fit to the Rasch model. A reduced FSS 7-item version demonstrated acceptable goodness-of-fit and explained 61.2% of the total variance in the scale. In the FSS-7 item version, no uniform Differential Item Functioning was found in relation to time of evaluation or to any of the socio-demographic or clinical variables. Conclusion: This study demonstrated that the FSS-7 has better psychometric properties than the FSS-9 in this HIV sample and that responses to the different items are comparable over time and unrelated to socio-demographic and clinical variables.
Further description : Erworben im Rahmen der Schweizer Nationallizenzen (http://www.nationallizenzen.ch)
Departement: Gesundheit
Organisational Unit: Institute of Occupational Therapy (IER)
Publication type: Article in scientific Journal
DOI : 10.1007/s11136-011-9877-8
10.21256/zhaw-2038
ISSN: 0962-9343
1573-2649
URI: https://digitalcollection.zhaw.ch/handle/11475/8392
Appears in Collections:Publikationen Gesundheit

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