Translation and psychometric properties of the Persian version of the stroke specific quality of life scale
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Background and Objectives: Stroke is a chronic disease that has profound effects on the patient and her family and is the most common disabling disorder in the nervous system. Stroke has a profound effect on quality of life, and these effects are classified by the World Health Organization as lesions, disability, and disablement. The aim of this study is to translation and psychometric properties the Persian version of the stroke specific quality of life scale. Methods: In 2016, this study was performed on 300 patients with definitive diagnosis of stroke hospitalized in Imam Reza and Razi hospitals of Tabriz University of Medical Sciences. In this study, the sample size required for factor analysis, 6 samples per tool was considered, which considering that the questionnaire has 49 items, the sample size of 300 items was considered. Fifty samples were selected for retesting. After identifying the samples and complying with the research criteria, the necessary information was provided about the purpose of the research and how to complete the questionnaire and keep the information confidential. After obtaining informed consent from the participants, the required information was completed. Questionnaire information includes demographic information (age and sex, marital status, level of education and type of stroke), specific stroke quality of life questionnaire (SSQOL) and SF-36 questionnaire. Exploratory factor analysis was used to investigate the validity of the structure. Also, Pearson correlation coefficient between the scores obtained from two questionnaire methods was used to evaluate simultaneous validity. Reliability was measured using intra-class correlation coefficient and Cronbach's alpha coefficient method. SPSS software version 22 was used to analyze the data. Results The results of the exploratory factor analysis section with the main component method and oblique rotation the 10 factors of self-care and upper extremity function (variance=46.09%), social roles (variance=60.29%) Language (variance =68.60%), vision (variance=74.47%), thinking (variance=79.56%), energy (variance =84.25%), personality (variance=87%), mood (variance =90.14%), mobility (variance=92.42%), family roles (variance =93.88%). Simultaneous validity also showed correlation (r = 0.73) and statistically significant (P ≤0.05). The reliability of the questionnaire was also reported by intra-class correlation coefficient and Cronbach's alpha method as 0.99 and 0.97, respectively. Conclusion: The Persian version of the Special Quality of Life Stroke Questionnaire (SSQOL) has moderate and acceptable psychometric properties for use in demographic studies and can be used to assess the quality of life of stroke patients.