ADDQoL AWI scores correlated strongly with ADDQoL diabetes-dependent global QOL scores (Spearman's rank correlation coefficient = 0.5983) and weakly with generic measures (r(s) = -0.028 for ADDQoL present global QOL scores, 0.310 for EQ-VAS, 0.164 for EQ-5D and 0.281 for SF-6D). In confirmatory factor analysis, the hypothesized one-factor solution was supported. In 88 participants (58% male, mean age 56.6 years), the mean (SD) ADDQoL average weighted impact (AWI) score was -2.613 (1.899). The usefulness of weighting and 'not applicable' (NA) options (key features of ADDQoL) were also evaluated. The ADDQoL was assessed for the following: internal consistency (Cronbach's alpha) test-retest reliability (intraclass correlation coefficient ) factor structure known-groups validity (insulin requiring vs non-insulin requiring, with vs without diabetes-related complications, overweight/obese vs not overweight/obese) and convergent and divergent validity (with EQ-VAS, EQ-5D and SF-6D). To evaluate the reliability and validity of the ADDQoL (Chinese version for Singapore) among Chinese-speaking Singaporeans with type 2 diabetes mellitus (T2DM).Ĭhinese versions of the ADDQoL, EuroQoL-Visual Analogue Scale (EQ-VAS), EQ-5D and SF-6D were administered to Chinese-speaking participants with T2DM (aged > or =21 years) at a tertiary acute-care hospital by convenience sampling. With the worldwide increase in the number of Chinese people diagnosed with diabetes, we anticipated that a Chinese-language version of the ADDQoL would be urgently needed. The Audit of Diabetes-Dependent Quality of Life (ADDQoL) questionnaire is an individualized instrument that measures the impact of diabetes mellitus on quality of life (QOL).
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