Please use this identifier to cite or link to this item:
|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|
Aouizerat, Bradley E.
Portillo, Carmen J.
Lee, Kathryn A.
|Published in :||Quality of Life Research|
|Publisher / Ed. Institution :||Springer|
|License (according to publishing contract) :||Licence according to publishing contract|
|Type of review:||Peer review (Publication)|
|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)|
|Organisational Unit:||Institute of Occupational Therapy (IER)|
|Publication type:||Article in scientific Journal|
|Appears in Collections:||Publikationen Gesundheit|
Files in This Item:
|2011_Kottorp_A7-itemVersionOfTheFatigueSeve.pdf||1.66 MB||Adobe PDF|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.