The Effect of Cigarette Use and Dual-Use on Depression and Sleep Quality.

Background: Recently, the use of cigarettes and e-cigarettes rises among Korean adults. This study examined between-groups differences in depression and sleep quality based on smoking/vaping status. Methods: The groups were classified into non-users, cigarette users, and dual-users according to the present use of cigarettes and e-cigarettes. Data from the 2018 Korean Community Health Survey (KCHS) were used in this study. The participants were 153,646 adults aged > 19cyears. Results: One-way analysis of covariance models showed that dual-users reported significantly higher depression scores (PHQ-9) and significantly lower sleep quality (PSQI-K), respectively, than did cigarette users and non-users. Conclusions: These results imply that dual-use can have a negative impact on mental health. This study supports previous studies on the harmfulness of dual-use and suggests that more studies related to the dual-use of cigarettes should be conducted in the future.