Modelling variability of quality of life scores: a study of questionnaire version and bilingualism

Quality of Life Research : an International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation
Y B CheungK Y Fong

Abstract

Modelling variability of quality of life scores can not only improve our understanding of the characteristics of the measurement tools, but also shed light on sample size requirements. Although the English and Chinese versions of the Short Form 36 Health Survey (SF-36) are commonly considered equivalent, they have not been compared in terms of variability. Furthermore, bilingual and monolingual persons may differ in cognition and responses to questionnaires. In a community-based survey of quality of life in Singapore, a society where both English and Chinese are widely used and bilingualism is prevalent, 2590 respondents answered either version of the SF-36. We studied the impact of questionnaire version and bilingualism on the variability of SF-36 scores by regression modelling, with adjustment for covariates. The Chinese version had smaller variances in the physical functioning (PF) and the physical component summary scores than the English version. The variance ratios (VRs) were respectively 0.32 and 0.60 (each p < 0.01), controlling for covariates. Bilingualism was not associated with variability in SF-36 scores except PF (VR = 0.78; p < 0.05). As a result of a smaller variance, using the Chinese version of SF-36 among bili...Continue Reading

Citations

Jan 24, 2008·Journal of Evaluation in Clinical Practice·A A ElnourJames C McElnay
Jun 24, 2006·Statistics in Medicine·Inmaculada ArosteguiJosé M Quintana
Jun 19, 2009·The International Journal of Eating Disorders·Inmaculada ArosteguiJose M Quintana
Aug 16, 2011·Value in Health : the Journal of the International Society for Pharmacoeconomics and Outcomes Research·Matthias HungerRolf Holle
Jul 30, 2005·Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology·Yin-Bun CheungJoseph Wee
May 17, 2005·Quality of Life Research : an International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation·Y B CheungJ Thumboo

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