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Qual Life Res. 2008 May;17(4):575-84. doi: 10.1007/s11136-008-9332-7.

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

Author information

1
Department of Hepatobiliary and Transplant Surgery, Center for Transplantation Medicine, University Medical Center Eppendorf, Hamburg, Germany. khschulz@uke.uni-hamburg.de

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: leep."

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.

PMID:
18389385
DOI:
10.1007/s11136-008-9332-7
[Indexed for MEDLINE]

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