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Information Journal Paper

Title

DEVELOPING A SHORTENED QUALITY OF LIFE SCALE FROM PERSIAN VERSION OF THE WHOQOL-100 USING THE RASCH ANALYSIS

Pages

  522-534

Abstract

 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 cur-rent health status groups (P<0.001). We eliminated 67 persons for under-fitting, 38 items for category and/or thresh-old 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.

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    APA: Copy

    YAZDANI, KAMRAN, NEDJAT, SAHARNAZ, KARIMLOU, MASOUD, ZERAATI, HOJJAT, MOHAMMAD, KAZEM, & FOTOUHI, AKBAR. (2015). DEVELOPING A SHORTENED QUALITY OF LIFE SCALE FROM PERSIAN VERSION OF THE WHOQOL-100 USING THE RASCH ANALYSIS. IRANIAN JOURNAL OF PUBLIC HEALTH, 44(4), 522-534. SID. https://sid.ir/paper/273766/en

    Vancouver: Copy

    YAZDANI KAMRAN, NEDJAT SAHARNAZ, KARIMLOU MASOUD, ZERAATI HOJJAT, MOHAMMAD KAZEM, FOTOUHI AKBAR. DEVELOPING A SHORTENED QUALITY OF LIFE SCALE FROM PERSIAN VERSION OF THE WHOQOL-100 USING THE RASCH ANALYSIS. IRANIAN JOURNAL OF PUBLIC HEALTH[Internet]. 2015;44(4):522-534. Available from: https://sid.ir/paper/273766/en

    IEEE: Copy

    KAMRAN YAZDANI, SAHARNAZ NEDJAT, MASOUD KARIMLOU, HOJJAT ZERAATI, KAZEM MOHAMMAD, and AKBAR FOTOUHI, “DEVELOPING A SHORTENED QUALITY OF LIFE SCALE FROM PERSIAN VERSION OF THE WHOQOL-100 USING THE RASCH ANALYSIS,” IRANIAN JOURNAL OF PUBLIC HEALTH, vol. 44, no. 4, pp. 522–534, 2015, [Online]. Available: https://sid.ir/paper/273766/en

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