We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Usefulness of the Audit of Diabetes-Dependent Quality-of-Life (ADDQoL) Questionnaire in Patients with Diabetes in a Multi-Ethnic Asian Country.
- Authors
Hwee-Lin Wee; Chee-Eng Tan; Su-Yen Goh; Shu-Chuen Li
- Abstract
INTRODUCTION: Asia will be at the forefront of the current epidemic of diabetes mellitus. Quality of life (QOL) is an important outcome measure in the assessment of diabetes care. However, few QOL instruments are culturally suitable for use in Asian countries. The Audit of Diabetes-Dependent Quality-of-Life (ADDQoL) questionnaire is a third-generation individualised QOL instrument. Individualised instruments such as the ADDQoL have the potential to be useful and less costly alternatives to computerised adaptive testing (CAT), which may not be practical in developing countries.The validity of the ADDQoL was tested with the following hypotheses: those with moderate or severe problems on the EQ-5D would have worse ADDQoL average weighted impact (AWI) scores than those with a perfect health rating on the EQ-5D; those with better Present QOL scores on the ADDQoL would have better EQ-5D utility and visual analogue scale (VAS) scores; on the ADDQoL, AWI scores would correlate better with diabetes-dependent QOL than with Present QOL scores; and female respondents, those who required insulin or had longer duration of known diabetes would have worse ADDQoL AWI scores (known-group validity). OBJECTIVE: To evaluate and validate the ADDQoL questionnaire in English-speaking patients with diabetes in Singapore, a multi-ethnic Asian country.The validity of the ADDQoL was tested with the following hypotheses: those with moderate or severe problems on the EQ-5D would have worse ADDQoL average weighted impact (AWI) scores than those with a perfect health rating on the EQ-5D; those with better Present QOL scores on the ADDQoL would have better EQ-5D utility and visual analogue scale (VAS) scores; on the ADDQoL, AWI scores would correlate better with diabetes-dependent QOL than with Present QOL scores; and female respondents, those who required insulin or had longer duration of known diabetes would have worse ADDQoL AWI scores (known-group validity). METHODS: The ADDQoL and EQ-5D were administered to English-speaking respondents with type 1 or 2 diabetes (aged ≥18 years) recruited from a tertiary acute-care referral hospital by convenience sampling. The usefulness of the key design features of the ADDQoL were assessed by measuring the number of zero-importance responses, the change in item ranking with and without weighting for importance, and the frequency of utilisation of the ‘not applicable’ (NA) options. The acceptability, factor structure and internal consistency (Cronbach’s α) of the ADDQoL were also assessed. Data were subjected to unforced factor analysis with oblimin rotation and then the condition was set to force a one-factor solution.The validity of the ADDQoL was tested with the following hypotheses: those with moderate or severe problems on the EQ-5D would have worse ADDQoL average weighted impact (AWI) scores than those with a perfect health rating on the EQ-5D; those with better Present QOL scores on the ADDQoL would have better EQ-5D utility and visual analogue scale (VAS) scores; on the ADDQoL, AWI scores would correlate better with diabetes-dependent QOL than with Present QOL scores; and female respondents, those who required insulin or had longer duration of known diabetes would have worse ADDQoL AWI scores (known-group validity). RESULTS: We analysed data from 152 respondents (49% Chinese, 34% Indian; 45% female; mean age 52 years, range 18–80; mean duration of known diabetes 10 years, range 0–62).&
- Publication
PharmacoEconomics, 2006, Vol 24, Issue 7, p673
- ISSN
1170-7690
- Publication type
Academic Journal
- DOI
10.2165/00019053-200624070-00006