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The Factor Structure of McGill Quality of Life Questionnaire in Patients with Heart Disease: Second-Order Confirmatory Factor Analysis. irje. 2018; 1111
URL: http://irje.tums.ac.ir/article-1-5842-en.html
Abstract:   (770 Views)
Background and Objectives: The impact of heart disease on quality of life is one of the issues that should be the interest of health care providers. Improving the quality of life considered as one of the goals of rehabilitation therapies and intervention. This study was conducted to evaluate the McGill quality of life questionnaire in patients with heart disease.
Materials and Methods: In this cross-sectional study, 500 patients with heart disease were recruited from BooAli Sina and Velayat hospital affiliated with the Qazvin University of Medical Sciences from May to August 2016. The participants completed the McGill Quality of Life Questionnaire. The construct validity including convergent and discriminant validity of the McGill Quality of Life Questionnaire was evaluated. Reliability was assessed using Cronbach’s alpha, Theta, and McDonald's Omega. Structure of the McGill Quality of Life Questionnaire was assessed using secondary confirmatory factor analysis.
Results: Three factors including overall view of the quality of life, physical aspects and psychological dimension were extracted based on the results of exploratory factor analysis. Model fit indexes showed a good fit (Comparative of Fit Index: CFI=.918, incremental fit index: IFI=.919, Adjusted Goodness of Fit Index: AGFI=.844, RMSEA=.079, Minimum Discrepancy Function by Degrees of Freedom divided: CMIN/DF=2.97, Parsimonious Normed Fit Index: PNFI=.681, Parsimonious Comparative Fit Index: PCFI=.709). Convergent and divergent validity as well as internal consistency, and construct reliability of the questionnaire were confirmed.
Conclusion: Findings revealed that the three factor model of the McGill quality of life has satisfactory validity and reliability. Thus, this questionnaire can be used in future studies to assess the quality of life of patients with heart disease.
Type of Study: Research | Subject: General
Received: 2018/01/1 | Accepted: 2018/01/1 | Published: 2018/01/1

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