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Construct and criterion validity of the DUFS and DEFS⁴ in Lithuanian patients with coronary artery disease.
MedLine Citation:
PMID:  21040245     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
BACKGROUND: Fatigue has become an important symptom in clinical diagnosis and clinical trials among subjects with cardiovascular diseases and disease-specific fatigue scales were developed in a Dutch and English version.
OBJECTIVE: Various questionnaires for measuring fatigue have been developed, but currently no validated questionnaire targeted at subjects with cardiovascular disease and heart failure exists in the Lithuanian language.
METHODS: Despite the rigor of the exploratory factor analysis and analyses of the psychometric properties of the disease-specific Dutch Fatigue Scale and the Dutch Exertion Fatigue Scale (DUFS-DEFS) we adopted a confirmatory approach considered as the gold standard method for the evaluation of construct validity in psychometric inventories. To test the criterion validity of the DUFS and DEFS structural equation modelling was employed with the widely used and validated Multidimensional Fatigue Inventory (MFI).
RESULTS: The a priori specification of a hypothesized five-factor model of the MFI-20 and a two-factor model of the DUFS and DEFS appeared to have a good fit to the data in Lithuanian patients. The hypothesized model of the criterion validity of the DUFS and DEFS had a good fit and classes of disease severity showed statistically significant and clinically relevant differences on fatigue scores.
CONCLUSION: The construct validity and criterion validity of the DUFS and DEFS were confirmed in a Lithuanian sample of cardiac patients. The construct validity of the MFI was also supported and this fatigue measure can be used in Lithuanian settings of clinical practice and research.
Authors:
Berrie Middel; Bieneke H van der Laan; Albinas Stankus; Klaske Wynia; Frits Jüch; Gerard Jansen; Mathieu de Greef
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Publication Detail:
Type:  Journal Article     Date:  2010-10-12
Journal Detail:
Title:  Journal of evaluation in clinical practice     Volume:  17     ISSN:  1365-2753     ISO Abbreviation:  J Eval Clin Pract     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-05-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9609066     Medline TA:  J Eval Clin Pract     Country:  England    
Other Details:
Languages:  eng     Pagination:  452-61     Citation Subset:  IM    
Copyright Information:
© 2010 Blackwell Publishing Ltd.
Affiliation:
Department of Health Sciences, Subdivision Nursing Science and Care Science, University Medical Center Groningen, University of Groningen, The Netherlands. l.j.middel@med.umcg.nl
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