Please use this identifier to cite or link to this item:
DC FieldValue
dc.titleModelling variability of quality of life scores: A study of questionnaire version and bilingualism
dc.contributor.authorCheung, Y.-B.
dc.contributor.authorThumboo, J.
dc.contributor.authorMachin, D.
dc.contributor.authorFeng, P.-H.
dc.contributor.authorBoey, M.-L.
dc.contributor.authorThio, S.-T.
dc.contributor.authorFong, K.-Y.
dc.identifier.citationCheung, Y.-B., Thumboo, J., Machin, D., Feng, P.-H., Boey, M.-L., Thio, S.-T., Fong, K.-Y. (2004-06). Modelling variability of quality of life scores: A study of questionnaire version and bilingualism. Quality of Life Research 13 (5) : 897-906. ScholarBank@NUS Repository.
dc.description.abstractBackground and objectives: 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. Methods: 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. Results: 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). Conclusions: As a result of a smaller variance, using the Chinese version of SF-36 among bilingual Chinese people may require a smaller sample size than using the English version.
dc.subjectQuality of life
dc.subjectRelative efficiency
dc.subjectSample size
dc.description.sourcetitleQuality of Life Research
Appears in Collections:Staff Publications

Show simple item record
Files in This Item:
There are no files associated with this item.

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.