Predictors of the continuous use of an infectious disease self-management app for epidemiological investigations: a survey of young and middle-aged adults in South Korean citizens

Abstract Background In the wake of the coronavirus disease-19 (COVID-19) pandemic, research on the difficulties faced by epidemiologists conducting epidemiological investigations has been progressing steadily. However, few studies have developed applications (apps) that can directly support epidemiological investigations via information and communication (ICT) technology, and conducted usability evaluations on them via user responses. This has caused difficulties when developing such technologies. We introduced and evaluated two mobile apps that support epidemiological investigations. This study attempted to identify the predictors affecting the acceptance of infectious disease self-management apps. Methods We developed two infectious disease self-management smartphone apps for epidemiological investigations: KODARI (the Korean version) and MEDARI (in English version). We collected data from 248 users of KODARI by surveying Korean citizens. This study was conducted from November 15 to December 14, 2022. We used multiple regression analysis to identify the variables that affected continuous intention to use the KODARI app. We conducted two independent-samples t-tests to determine whether there were any differences in the perception of each variable in relation to demographic and COVID-19-related user characteristics. Results The factors that affected continuous intention to use the KODARI app, in order of relative importance, were: price value, satisfaction, performance expectancy, and facilitating conditions. Overall, male participants were more satisfied with the KODARI app than female ones, and more willing to continue using it. The male participants also evaluated facilitating conditions more positively than the female ones did. Married participants rated the app higher than single ones in terms of price value, performance expectancy, and continued intention to use. Conclusions The study suggests factors that increase the use of health apps and suggests that use of these apps may increase further in the event of a future pandemics. These results are expected to help researchers study other infectious disease apps in the context of public health surveillance.