Developing a Shortened Quality of Life Scale from Persian Version of the WHOQOL-100 Using the Rasch Analysis.
Background: Few studies use modern approaches to develop a quality of life (QOL) questionnaire with acceptable construct validity, especially in Iran. Our main objective was to construct a new validated and uni-dimensional questionnaire, based on WHOQOL-100, using the Rasch analysis. Methods: In a p...
| Publicado en: | Iranian Journal of Public Health Vol. 44; no. 4; pp. 522 - 535 |
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| Autores principales: | , , , , , |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
Tehran University of Medical Sciences
Apr2015
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=103131251&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 103131251 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 22516085 6N6F jtl: Iranian Journal of Public Health issn: 22516085 maglogo: N pubinfo: dt: Apr2015 vid: 44 iid: 4 pid: 21783 pub: Tehran University of Medical Sciences artinfo: ui: 103131251 103131251 103131251 103131251 ppf: 522 ppct: 13 formats: fmt: @attributes: type: P tig: atl: Developing a Shortened Quality of Life Scale from Persian Version of the WHOQOL-100 Using the Rasch Analysis. aug: au: YAZDANI, Kamran NEDJAT, Saharnaz KARIMLOU, Masoud ZERAATI, Hojjat MOHAMMAD, Kazem FOTOUHI, Akbar affil: Dept. of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran sug: subj: Instrument Construction Instrument Validation Questionnaires Quality of Life Human Rasch Analysis Iran Construct Validity Cross Sectional Studies Random Sample Item Analysis Male Female Validation Studies Descriptive Statistics Adult Educational Status Health Status Adolescence Young Adult Data Analysis Software Middle Age Reliability Funding Source Adult: 19-44 years Adolescent: 13-18 years Middle Aged: 45-64 years Male Female ab: Background: Few studies use modern approaches to develop a quality of life (QOL) questionnaire with acceptable construct validity, especially in Iran. Our main objective was to construct a new validated and uni-dimensional questionnaire, based on WHOQOL-100, using the Rasch analysis. Methods: In a population-based, cross-sectional study in 2007, 500 Tehran residents aged≥18 were randomly sampled. The Persian version of WHOQOL-100 was used to measure the participants' QOL. After using targeting and person fit analysis, we performed category/threshold ordering, item fit, and differential item functioning analyses, in succession. We used outfit or infit statistics>1.5 and <0.5 for detecting underfit and overfit items/persons, respectively. We also deleted items with disordered category and/or threshold. Person Separation Index and test reliability were also calculated in the datasets. Results: Male to female ratio was 0.98 and the mean age (SD) of participants was 35.1 (12.8) years. Initial analyses showed significant differences in quality of life between age groups (P=0.002), educational levels (P=0.001), and current health status groups (P<0.001). We eliminated 67 persons for under-fitting, 38 items for category and/or threshold disordering, 6 items for under-fitting, and 26 items for item bias. Test reliability for the final 30-item scale was 0.89. Conclusion: We prepared a shortened version of the WHOQOL-100 that is single construct, uni-dimensional and free of item bias or any disordering, according to the Rasch model. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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