Validity and Reliability of the Verran and Snyder-Halpern Sleep Scale in Iranian population

Background and The aim of the present study was to examine the validity, reliability and factor structure analysis of the Persian version of the Verran and Snyder-Halpern Sleep Scale (VSH). This scale is used to evaluate sleep quality in hospitalized patients and their perception of sleep for the preceding night. The Persian version of the scale was provided using forward translation. Then, 220 hospitalized patients were randomly selected to complete the approved version of the VSH sleep scale. Face validity was confirmed by experts, and content validity and construct validity were confirmed by CVR and exploratory factor analysis, respectively. The reliability of the items was determined by Cronbach's alpha coefficient and bisection method. Cronbach's alpha coefficient and reliability of the scale was 0.43 before the analysis. Exploratory factor analysis with principal components and varimax rotation led to the extraction of three factors. The first was sleep disturbance that included 6 items of the 7 items in VSH sleep scale. The second was sleep supplementation that included 3 items of the 4 items in the scale. The last factor was sleep effectiveness which included only a single item from 5 items thereby, being removed from the scale. The remaining two factors explained 55.31% of the total variance. Cronbach's alpha coefficient of the new questions was 0.83 and using Bisection test the correlation coefficient was 0.7. Reliability and validity of the Persian form of the VSH sleep scale proves that this version is appropriate for measuring the quality of sleep in Iranian hospitalized population.