Ordinal-to-interval Scale Conversion Tables and National Items for the New Zealand Version of the WhOQOL-BREF

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aut.relation.issue11en_NZ
aut.relation.journalPLoS Oneen_NZ
aut.relation.startpagee0166065
aut.relation.volume11en_NZ
aut.researcherKrageloh, Christian
dc.contributor.authorKrageloh, CUen_NZ
dc.contributor.authorBillington, DRen_NZ
dc.contributor.authorHsu, PHen_NZ
dc.contributor.authorFeng, XJen_NZ
dc.contributor.authorMedvedev, ONen_NZ
dc.contributor.authorKersten, Pen_NZ
dc.contributor.authorLandon, Jen_NZ
dc.contributor.authorSiegert, RJen_NZ
dc.date.accessioned2018-11-16T02:29:51Z
dc.date.available2018-11-16T02:29:51Z
dc.date.copyright2016en_NZ
dc.date.issued2016en_NZ
dc.description.abstractThe World Health Organisation Quality of Life (WHOQOL) questionnaires are widely used around the world and can claim strong cross-cultural validity due to their development in collaboration with international field centres. To enhance conceptual equivalence of quality of life across cultures, optional national items are often developed for use alongside the core instrument. The present study outlines the development of national items for the New Zealand WHOQOL-BREF. Focus groups with members of the community as well as health experts discussed what constitutes quality of life in their opinion. Based on themes extracted of aspects not contained in the existing WHOQOL instrument, 46 candidate items were generated and subsequently rated for their importance by a random sample of 585 individuals from the general population. Applying importance criteria reduced these items to 24, which were then sent to another large random sample (n = 808) to be rated alongside the existing WHOQOL-BREF. A final set of five items met the criteria for national items. Confirmatory factor analysis identified four national items as belonging to the psychological domain of quality of life, and one item to the social domain. Rasch analysis validated these results and generated ordinal-to-interval conversion algorithms to allow use of parametric statistics for domain scores with and without national items.en_NZ
dc.identifier.citationPloS one, 11(11), e0166065.
dc.identifier.doi10.1371/journal.pone.0166065en_NZ
dc.identifier.issn1932-6203en_NZ
dc.identifier.urihttps://hdl.handle.net/10292/12025
dc.languageENGen_NZ
dc.publisherPLOS
dc.relation.urihttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0166065
dc.rights© 2016 Krägeloh et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
dc.rights.accessrightsOpenAccessen_NZ
dc.titleOrdinal-to-interval Scale Conversion Tables and National Items for the New Zealand Version of the WhOQOL-BREFen_NZ
dc.typeJournal Article
pubs.elements-id214513
pubs.organisational-data/AUT
pubs.organisational-data/AUT/Health & Environmental Science
pubs.organisational-data/AUT/Health & Environmental Science/Public Health & Psych Studies
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