Abstract：Objective To investigate the prevalence of electronic cigarette use among adult residents at ages of 15 years and older in Tongzhou District, Beijing Municipality, so as to provide insights into formulation of tobacco control interventions. Methods Permanent residents at ages of 15 years and older were sampled using a stratified multi-stage cluster random sampling method in Tongzhou District from September to October, 2021, and subjects' demographics, electronic cigarette use, and exposure to electronic cigarette advertising were investigated using the 2021 Questionnaire for Adult Tobacco Survey in Beijing. The awareness of electronic cigarette knowledge, prevalence of electronic cigarette use, route of acquiring electronic cigarette knowledge and route of exposure to electronic cigarette advertising were analyzed among residents in Tongzhou District, and factors affecting electronic cigarette uses were identified using a multivariable logistic regression model. Results A total of 1 196 questionnaires were allocated, and 1 166 valid questionnaires were recovered, with an effective recovery rate of 97.49%. The respondents included 532 men (45.63%) and 634 women (54.37%), with a mean age of (57.05±15.04) years. The awareness of electronic cigarette knowledge was 67.58%, and the prevalence of electronic cigarette uses and current electronic cigarette uses was 3.94% and 0.34%, respectively. Multivariable logistic regression analysis showed a higher possibility of electronic cigarette uses among men (OR=28.492, 95%CI: 6.873-118.106), residents at ages of 15 to 44 years (OR=3.219, 95%CI: 1.584-6.539), enterprise workers/businessmen/service industry workers (OR=3.599, 95%CI: 1.527-8.482), and public institution workers/public servants/students (OR=4.403, 95%CI: 1.758-11.026). The main route of acquiring electronic cigarettes was presented by others (43.48%), and the main cause of electronic cigarette use was quitting smoking (30.43%), followed by thinking little harmlessness of electronic cigarette use (26.09%), while the main route of exposure to electronic cigarette advertising was television (59.09%), followed by internet (45.45%). Conclusions There is a low prevalence rate of electronic cigarette uses among residents at ages of 15 years and older in Tongzhou District, and men and residents at ages of 15 to 44 years are main electronic cigarette users. Health education pertaining to the harmlessness of electronic cigarette uses and supervision of electronic cigarette advertising are required to be reinforced.
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