Analyzing differential item functioning of the Nottingham Health Profile by Mixed Rasch Model

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dc.contributor.authorElhan, Atilla Halil
dc.contributor.departmentTıp Fakültesitr_TR
dc.date.accessioned2021-01-05T07:36:46Z
dc.date.available2021-01-05T07:36:46Z
dc.date.issued2018
dc.description.abstractObjectives: This study aims to evaluate whether items in the Turkish version of the Nottingham Health Profile (NHP) function differently according to age, sex, and duration of pain using the Mixed Rasch Model (MRM). Patients and methods: The NHP data of patients with low back pain from a previous study was analyzed. To analyze differential item functioning (DIF) within the items of the NHP, the MRM was used. Age, sex, and duration of pain were considered factors which could cause DIF. The most powerful factor to define latent classes derived from the MRM was estimated using the Rasch tree method. Results: The two-class mixture version of the nominal response model was identified as the best fitting model for the physical mobility, sleep, and social isolation sections. For the physical mobility dimension, some items showed DIF by age and for the social isolation dimension some items showed DIF by sex. For the sleep dimension, latent classes were unable to be explained by age, sex, and duration of pain. Items in other dimensions of the NHP were DIF-free and no items showed DIF according to age, sex, and duration of pain. Conclusion: The results of this study may shed light on explaining the different response behavior of patients on the items of the NHP. Age and sex were found to be variables affecting item responses of NHP. Contrary to expectations, duration of pain did not cause DIF for any item. From the perspective of DIF, it can be concluded that NHP scale is a robust scale in terms of validity.tr_TR
dc.description.indexPubmed
dc.identifier.endpage307tr_TR
dc.identifier.issue4tr_TR
dc.identifier.startpage300tr_TR
dc.identifier.urihttps://doi.org/10.5606/tftrd.2018.2796tr_TR
dc.identifier.urihttp://hdl.handle.net/20.500.12575/72631
dc.identifier.volume64tr_TR
dc.language.isoentr_TR
dc.relation.isversionof10.5606/tftrd.2018.2796tr_TR
dc.relation.journalTurk J Phys Med Rehabil .tr_TR
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıtr_TR
dc.subjectDifferential item functioningtr_TR
dc.subjectMixed Rasch Modeltr_TR
dc.subjectNottingham Health Profiletr_TR
dc.titleAnalyzing differential item functioning of the Nottingham Health Profile by Mixed Rasch Modeltr_TR
dc.typeArticletr_TR

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