Objective: To understand the current status and its associated factors of dual use of e-cigarettes and cigarettes among adolescents in Shandong Province and explore the reasons for dual use behavior. Methods: A self-administered survey was conducted among 7 999 middle school students who were selected by stratified multi-stage cluster sample method. Data were weighted and analyzed by the SPSS 25.0 complex program. Results: In Shandong Province, the prevalence rates of attempting and current dual use of e-cigarettes and cigarettes among adolescents appeared as 7.7% and 1.3%, respectively. Male, friends smoking, and secondhand smoke exposure in the past 7 days were risk factors for dual use. Compared with cigarette smokers, dual users have no differences in cognition and behavior in quitting smoking (P>0.05). The main reason for dual users to smoke e-cigarettes was curiosity. Conclusions: Dual use of e-cigarettes and cigarettes is common among adolescents in Shandong Province, and its influencing factors are similar to traditional cigarettes. Dual use is not a transitional stage for smoking cessation. Dual users are more likely to continue smoking in the future, which should be paid attention and concern.
目的： 了解山东省青少年电子烟和卷烟的双重使用现状及其影响因素，探讨产生双重使用的原因。 方法： 采用分层多阶段整群随机抽样方法，在山东省共抽取中学在校学生7 999人进行自填问卷调查。对样本进行加权后，使用SPSS 25.0软件复杂抽样模块对数据进行分析。 结果： 山东省青少年电子烟和卷烟双重尝试的比例为7.7%，双重使用的比例为1.3%。男生、好友吸烟、过去7 d二手烟暴露是双重使用的危险因素。双重使用者与仅吸卷烟者相比，在戒烟方面的认知和行为差异无统计学意义（P>0.05），双重使用者吸电子烟的原因主要为好奇。 结论： 山东省青少年电子烟和卷烟双重使用行为普遍存在，其影响因素与传统卷烟类似。双重使用并非戒烟的过渡阶段，双重使用者未来持续吸烟的可能性较高，应引起关注和重视。.