The Short Form 36 English and Chinese versions were equivalent in a multiethnic Asian population

Maudrene L S Tan, Hwee-Lin Wee, Jeannette Lee, Stefan Ma, Derrick Heng, E-Shyong Tai, Julian Thumboo
Journal of Clinical Epidemiology 2013, 66 (7): 759-67

OBJECTIVE: The primary aim of this article was to evaluate measurement equivalence of the English and Chinese versions of the Short Form 36 version 2 (SF-36v2) and Short Form 6D (SF-6D).

STUDY DESIGN AND SETTING: In this cross-sectional study, health-related quality of life (HRQoL) was measured from 4,973 ethnic Chinese subjects using the SF-36v2 questionnaire. Measurement equivalence of domain and utility scores for the English- and Chinese-language SF-36v2 and SF-6D were assessed by examining the score differences between the two languages using linear regression models, with and without adjustment for known determinants of HRQoL. Equivalence was achieved if the 90% confidence interval (CI) of the differences in scores, due to language, fell within a predefined equivalence margin.

RESULTS: Compared with English-speaking Chinese, Chinese-speaking Chinese were significantly older (47.6 vs. 55.5 years). All SF-36v2 domains were equivalent after adjusting for known HRQoL. SF-6D utility/items had the 90% CI either fully or partially overlap their predefined equivalence margin.

CONCLUSION: The English- and Chinese-language versions of the SF-36v2 and SF-6D demonstrated equivalence.

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