The increasing prevalence of e-cigarette use (“vaping”) among youth has emerged as a public health concern. We aim to explore vape use, knowledge levels, and correlates in a sample of Australian young adults. Participants from six residential university colleges in Queensland, Australia, were invited to complete an online survey. The sample included 716 students (M_age=18.1 years). Correlates of vape use and knowledge examined included socio-demographic variables, other substance use, and mental health, including PHQ-9 depression and GAD-7 anxiety. In our sample, 62% of students reported lifetime vaping. Just under half (47.5%) of the sample had used flavour with nicotine vapes, 18.0% had used flavour only, and 2.8% had used other drugs. Past month vaping rates were low at 4.2% for daily use of flavour with nicotine vapes. Co-use of cigarettes was observed with nicotine vapes but most only vaped occasionally. A substantial proportion lacked knowledge about the legality (37.4%) and health harms (25.4%) of vapes. Males had higher odds of vaping. Use of cigarettes, binge drinking, and cannabis use were associated with vaping. While the co-use of cigarettes with nicotine vapes was observed, this was generally only seen among those who vaped occasionally. A notable knowledge gap existed regarding the legality and awareness of the health harms of vaping, signalling a need for educational initiatives. Future research should continue to monitor emerging vaping trends and long-term outcomes. The project was pre-registered on the Australian New Zealand Clinical Trials Registry (registration number: ACTRN12622000239763).

青少年中电子烟使用（“电子烟”）的日益普及已成为一个公共健康问题。我们的目标是探索澳大利亚年轻人样本中电子烟的使用、知识水平和相关性。来自澳大利亚昆士兰州六所住宿大学学院的参与者被邀请完成一项在线调查。样本包括 716 名学生（M_年龄=18.1 岁）。电子烟使用和知识检查的相关性包括社会人口变量、其他物质使用和心理健康，包括 PHQ-9 抑郁症和 GAD-7 焦虑症。在我们的样本中，62% 的学生表示终生吸电子烟。不到一半（47.5%）的样本使用过含有尼古丁电子烟的香精，18.0%的人仅使用过香精，2.8%的人使用过其他药物。过去一个月，每日使用尼古丁风味电子烟的吸食率较低，仅为 4.2%。观察到香烟与尼古丁电子烟同时使用，但大多数人只是偶尔吸电子烟。很大一部分人对电子烟的合法性（37.4%）和健康危害（25.4%）缺乏了解。男性吸电子烟的几率更高。吸烟、酗酒和吸食大麻与电子烟有关。虽然观察到香烟与尼古丁电子烟同时使用，但这种情况通常只发生在偶尔吸电子烟的人中。关于电子烟对健康危害的合法性和认识存在显着的知识差距，这表明需要采取教育举措。未来的研究应继续监测新兴的电子烟趋势和长期结果。该项目已在澳大利亚新西兰临床试验注册中心预注册（注册号：ACTRN12622000239763）。