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Scandinavian Journal of Public Health
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Psychometric properties of the Swedish version of the Well-Being Questionnaire in a sample of patients with diabetes type 1

Anne-Louise Bergh

The Department of Health Science, University of Göteborg, Claes-Hakan.Bergh{at}Sahlgrenska.se

Lars-Olof Persson

The Department of Health Science, University of Göteborg

Stig Attvall

The Diabetic Centre, Department of Internal Medicine, Sahlgrenska University Hospital, Göteborg, Sweden

Objectives: The aim of the present investigation was to further test the psychometric properties of a Swedish version of the Well-Being Questionnaire (WBQ) in order to determine whether it could be suitable for measuring health-related quality of life among type 1 diabetic patients. Methods: In total, 94 patients who fulfilled the inclusion criteria were selected for the study and of these 85% participated. Reliability was tested with Cronbach's alpha coefficient and the internal validity by means of principal component analysis and multitrait analysis. To test the external validity, comparisons were made with two other questionnaires, the Short form-36 and a Swedish Mood Adjective Check List. Results: The results show that, above all, the Swedish version of the WBQ measures psychological well-being, and thus must also be complemented with scales that measure other consequences of the illness and/or treatment, i.e. physical symptoms. The questionnaire has low discriminatory validity between subscales, which casts doubt on the appropriateness of using the four subscales as separate measures. The two scales measuring anxiety and depression are not sensitive enough for use among type 1 diabetics without complications and high or normal levels of psychological well-being. Conclusions: The Well-Being Questionnaire alone does not give any more information about subjective health status among type 1 diabetic patients than, for example, the generic SF-36.

Key Words: diabetes mellitus • health status assessment • psychometrics • subjective well-being • Well-being Questionnaire (WBQ).

Scandinavian Journal of Public Health, Vol. 28, No. 2, 137-145 (2000)
DOI: 10.1177/140349480002800210
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