Developing a Diabetes Knowledge Scale for Adults and its Psychometric Properties

Authors : Kübra YAVUZ, Saime EROL

Pages : 711-718

Doi:10.33808/clinexphealthsci.1014888

View : 25 | Download : 15

Publication Date : 2022-09-28

Article Type : Research Paper

Abstract :Objective: This study was conducted to develop and test the psychometric properties of a “Diabetes Knowledge Scale for Adults.” Methods: The sample for this research of methodological design consisted of 500 individuals, ages 18-90, who had presented at a state hospital in Istanbul during the period October 2018-April 2019 with or without a diagnosis of diabetes. Data for the study were collected with a “Sociodemographic Characteristics Descriptive Questionnaire” and the “Diabetes Knowledge Scale for Adults insert ignore into journalissuearticles values(DKSA);.” The validity of the scale was evaluated with the content validity index and construct validity testing insert ignore into journalissuearticles values(exploratory, confirmatory factor analyses);. Its reliability was assessed with KR-20 internal consistency analysis, item-total correlation testing, the item discrimination, item difficulty indexes, and test-retest analysis. Results: The content validity index for the 28-item scale was found to be 0.92. The exploratory factor analysis revealed five subscales that explained 62.15% of scale variance. The results of the confirmatory factor analysis, GFI= 0.88 CFI= 0.93, AGFI= 0.86, SRMR= 0.01 and χ²/ df = 2.43, confirmed a good and acceptable level of goodness of fit for the scale. The scale’s KR-20 reliability coefficient was 0.94, item-total correlations were above .45 and the correlation between the test-retests administered two weeks apart was found to be r=0.99 Conclusion: DKSA is a valid and reliable scale that can be used to determine the knowledge level of between the ages of 18-90 adults about diabetes.
Keywords : Diabetes, scale, knowledge, validity, reliability, adult