Abstract
Objectives
Our objective was to undertake linguistic validation and cultural adaptation of the Japanese version of the Audit of Diabetes-Dependent Quality of Life (JP-ADDQoL) and to evaluate its psychometric properties when completed by Japanese patients with diabetes.
Methods
We followed the standard linguistic validation procedure and subsequently evaluated the reliability (internal consistency) and construct validity (exploratory and confirmatory factor analyses) of the translated version by surveying 239 Japanese patients with diabetes.
Results
We translated 19 items for the JP-ADDQoL. The internal consistency was excellent (Cronbach’s alpha = 0.933). In the exploratory factor analysis, four factors were extracted, and most of the items in all four factors had high loadings. Forced one-factor analysis revealed all factor loadings other than those for sex life to be >0.40 (sex life: 0.398). Confirmatory factor analysis indicated an acceptable fit for the JP-ADDQoL.
Conclusions
The JP-ADDQoL showed adequate reliability and acceptable validity. Examining not only the impact of diabetes on a specific domain of life but also its importance for each patient leads to more accurate and individualized measurement of the patient’s QoL.
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Acknowledgments
The authors thank the author of the original English version of the ADDQoL, Professor Clare Bradley of Royal Holloway, University of London, for permission to undertake the linguistic validation of the ADDQoL and use the instrument in this work. For access to the ADDQoL, please visit http://www.healthpsychologyresearch.com. The authors are also grateful to the patients who participated in this study and to the staff of the University of Tsukuba Mito Medical Center who helped us administer the questionnaire. This work was financially supported in part by the Ministry of Health, Labour and Welfare, Japan H. Sone is a recipient of a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science. The sponsors had no role in the design and conduct of the study. The authors are held responsible for false statements or failure to fulfill the COPE guidelines.
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Hirose, A.S., Fujihara, K., Miyamasu, F. et al. Development and evaluation of the Japanese version of the Audit of Diabetes-Dependent Quality of Life for patients with diabetes. Diabetol Int 7, 384–390 (2016). https://doi.org/10.1007/s13340-016-0260-4
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DOI: https://doi.org/10.1007/s13340-016-0260-4