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Ordinal-To-Interval Scale Conversion Tables and National Items for the New Zealand Version of the WHOQOL-BREF
The 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, option...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Public Library of Science
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5094704/ https://www.ncbi.nlm.nih.gov/pubmed/27812203 http://dx.doi.org/10.1371/journal.pone.0166065 |
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author | Krägeloh, Christian U. Billington, D. Rex Hsu, Patricia Hsien-Chuan Feng, Xuan Joanna Medvedev, Oleg N. Kersten, Paula Landon, Jason Siegert, Richard J. |
author_facet | Krägeloh, Christian U. Billington, D. Rex Hsu, Patricia Hsien-Chuan Feng, Xuan Joanna Medvedev, Oleg N. Kersten, Paula Landon, Jason Siegert, Richard J. |
author_sort | Krägeloh, Christian U. |
collection | PubMed |
description | The 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. |
format | Online Article Text |
id | pubmed-5094704 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-50947042016-11-18 Ordinal-To-Interval Scale Conversion Tables and National Items for the New Zealand Version of the WHOQOL-BREF Krägeloh, Christian U. Billington, D. Rex Hsu, Patricia Hsien-Chuan Feng, Xuan Joanna Medvedev, Oleg N. Kersten, Paula Landon, Jason Siegert, Richard J. PLoS One Research Article The 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. Public Library of Science 2016-11-03 /pmc/articles/PMC5094704/ /pubmed/27812203 http://dx.doi.org/10.1371/journal.pone.0166065 Text en © 2016 Krägeloh et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Krägeloh, Christian U. Billington, D. Rex Hsu, Patricia Hsien-Chuan Feng, Xuan Joanna Medvedev, Oleg N. Kersten, Paula Landon, Jason Siegert, Richard J. Ordinal-To-Interval Scale Conversion Tables and National Items for the New Zealand Version of the WHOQOL-BREF |
title | Ordinal-To-Interval Scale Conversion Tables and National Items for the New Zealand Version of the WHOQOL-BREF |
title_full | Ordinal-To-Interval Scale Conversion Tables and National Items for the New Zealand Version of the WHOQOL-BREF |
title_fullStr | Ordinal-To-Interval Scale Conversion Tables and National Items for the New Zealand Version of the WHOQOL-BREF |
title_full_unstemmed | Ordinal-To-Interval Scale Conversion Tables and National Items for the New Zealand Version of the WHOQOL-BREF |
title_short | Ordinal-To-Interval Scale Conversion Tables and National Items for the New Zealand Version of the WHOQOL-BREF |
title_sort | ordinal-to-interval scale conversion tables and national items for the new zealand version of the whoqol-bref |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5094704/ https://www.ncbi.nlm.nih.gov/pubmed/27812203 http://dx.doi.org/10.1371/journal.pone.0166065 |
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