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01-05-2008

The factorial structure of the Chronic Liver Disease Questionnaire (CLDQ)

Auteurs: Karl-Heinz Schulz, Sylvia Kroencke, Heike Ewers, Holger Schulz, Zobair M. Younossi

Gepubliceerd in: Quality of Life Research | Uitgave 4/2008

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Abstract

Objective

The Chronic Liver Disease Questionnaire (CLDQ) is a disease-specific instrument designed to assess health-related quality of life in patients with chronic liver disease. The aim of this paper is to present the psychometric properties of a German version of this questionnaire. A special focus is placed on the analysis of the CLDQ’s factorial structure.

Methods

Five hundred and twenty-four patients completed the CLDQ from May 1999 to October 2006. The results were subject to item analysis, reliability and validity assessments, and confirmatory and exploratory factor analysis.

Results

The distribution characteristics on the item and scale level were satisfactory. Internal consistency was good to excellent; retest reliability acceptable. Validity could be confirmed by characteristic subscale correlations with other quality-of-life scales. Confirmatory factor analysis could not sufficiently reproduce the original factor structure. Exploratory factor analysis suggested five out of six subscales of the original version and yielded a new subscale: “sleep.”

Conclusion

CLDQ’s reliability and validity have been confirmed. In addition, the demonstrated practical administration of the questionnaire suggests that it should serve as a routine quality of life assessment of patients with chronic liver disease.
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Metagegevens
Titel
The factorial structure of the Chronic Liver Disease Questionnaire (CLDQ)
Auteurs
Karl-Heinz Schulz
Sylvia Kroencke
Heike Ewers
Holger Schulz
Zobair M. Younossi
Publicatiedatum
01-05-2008
Uitgeverij
Springer Netherlands
Gepubliceerd in
Quality of Life Research / Uitgave 4/2008
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-008-9332-7