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dc.contributor.authorRaczek, Anastasia E.
dc.contributor.authorWare, John E. Jr.
dc.contributor.authorBjorner, Jakob B.
dc.contributor.authorGandek, Barbara
dc.contributor.authorHaley, Stephen M.
dc.contributor.authorAaronson, Neil K.
dc.contributor.authorApolone, Giovanni
dc.contributor.authorBech, Per
dc.contributor.authorBrazier, John E.
dc.contributor.authorBullinger, Monika
dc.contributor.authorSullivan, Marianne
dc.date2022-08-11T08:10:41.000
dc.date.accessioned2022-08-23T17:16:31Z
dc.date.available2022-08-23T17:16:31Z
dc.date.issued1998-11-17
dc.date.submitted2010-06-18
dc.identifier.citationJ Clin Epidemiol. 1998 Nov;51(11):1203-14. <a href="http://dx.doi.org/10.1016/S0895-4356(98)00112-7">Link to article on publisher's site</a>
dc.identifier.issn0895-4356 (Linking)
dc.identifier.doi10.1016/S0895-4356(98)00112-7
dc.identifier.pmid9817138
dc.identifier.urihttp://hdl.handle.net/20.500.14038/47415
dc.description.abstractRasch models for polytomous items were used to assess the scaling assumptions and compare item response patterns in the 10-item SF-36 physical functioning scale (PF-10) for general population respondents in Denmark, Germany, Italy, the Netherlands, Sweden, the United Kingdom, and the United States. The Rasch model of physical functioning developed in the United States was compared to models for other countries, and each country was compared to a multinational composite. Strong scale congruence across the seven countries was demonstrated; items that varied between countries and from the composite may reflect unique cultural response patterns or differences in translation. Scoring algorithms based on the Rasch model for each country were superior to the current Likert scoring in tests of relative validity (RV) in discriminating among age groups in all countries. In relation to the Likert PF-10 scoring (RV = 1.00), scores estimated using the Rasch rating scale model achieve a median RV of 1.31 (range: 1.01-1.59), while the Rasch partial credit model attained a median RV of 1.44 (range: 1.01-2.23). Rasch models hold good potential for improving health status measures, estimating individual scores when responses to scale items are missing, and equating scores across countries.
dc.language.isoen_US
dc.relation<a href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&list_uids=9817138&dopt=Abstract">Link to Article in PubMed</a>
dc.relation.urlhttp://dx.doi.org/10.1016/S0895-4356(98)00112-7
dc.subjectAged
dc.subjectAged, 80 and over
dc.subjectAlgorithms
dc.subjectCross-Cultural Comparison
dc.subject*Health Status Indicators
dc.subjectHumans
dc.subjectMiddle Aged
dc.subjectPsychometrics
dc.subject*Quality of Life
dc.subjectReproducibility of Results
dc.subjectTranslations
dc.subjectBiostatistics
dc.subjectEpidemiology
dc.subjectHealth Services Research
dc.titleComparison of Rasch and summated rating scales constructed from SF-36 physical functioning items in seven countries: results from the IQOLA Project. International Quality of Life Assessment
dc.typeJournal Article
dc.source.journaltitleJournal of clinical epidemiology
dc.source.volume51
dc.source.issue11
dc.identifier.legacycoverpagehttps://escholarship.umassmed.edu/qhs_pp/555
dc.identifier.contextkey1363390
html.description.abstract<p>Rasch models for polytomous items were used to assess the scaling assumptions and compare item response patterns in the 10-item SF-36 physical functioning scale (PF-10) for general population respondents in Denmark, Germany, Italy, the Netherlands, Sweden, the United Kingdom, and the United States. The Rasch model of physical functioning developed in the United States was compared to models for other countries, and each country was compared to a multinational composite. Strong scale congruence across the seven countries was demonstrated; items that varied between countries and from the composite may reflect unique cultural response patterns or differences in translation. Scoring algorithms based on the Rasch model for each country were superior to the current Likert scoring in tests of relative validity (RV) in discriminating among age groups in all countries. In relation to the Likert PF-10 scoring (RV = 1.00), scores estimated using the Rasch rating scale model achieve a median RV of 1.31 (range: 1.01-1.59), while the Rasch partial credit model attained a median RV of 1.44 (range: 1.01-2.23). Rasch models hold good potential for improving health status measures, estimating individual scores when responses to scale items are missing, and equating scores across countries.</p>
dc.identifier.submissionpathqhs_pp/555
dc.contributor.departmentDepartment of Quantitative Health Sciences
dc.source.pages1203-14


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