INTRODUCTION Tobacco and marijuana co-use among young people in the U.S. is a public health concern that deserves greater attention. This study addresses a significant gap in the literature by examining the prevalence and correlates of tobacco and marijuana co-use among young people experiencing homelessness. METHODS The analytic sample consisted of 449 unaccompanied homeless youth (mean age = 22; 72% male) who had used any type of tobacco product in the past 30 days. Participants were recruited from 12 service sites and 13 street sites in Los Angeles County. RESULTS Over 90% of young homeless tobacco users reported past month marijuana and tobacco co-use: 65% reported any co-administration (mixing both substances in a cigarette, joint, blunt, bong, hookah, pipe or bowl) and 27% reported only using them separately. Analysis of covariance tests found that co-administrators reported greater quantity and frequency of tobacco cigarette use, more frequent marijuana use and, in some cases, poorer functioning and more severe homelessness compared to other tobacco users (p < 0.05). Logistic regression analysis indicated that co-administration was less likely among youth who were Black (vs. white) and who perceived it as being the same or more harmful than cigarette smoking, but more likely among youth who reported greater exposure to peers who engaged in co-administration (p < 0.05). CONCLUSIONS Co-administration of tobacco and marijuana is prevalent among young tobacco users experiencing homelessness. Results add to a growing literature on the prevalence and potential risks of co-administration among young people that can inform policies aimed at regulating tobacco and marijuana products.

中文翻译：

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洛杉矶县正在经历无家可归的年轻人中烟草和大麻的并用。

引言美国年轻人中烟草和大麻的并用是公共卫生问题，应引起更多关注。这项研究通过检查无家可归的年轻人中烟草和大麻共同使用的流行及其相关性，解决了文献中的一个重大空白。方法该分析样本包括449名无人陪伴的无家可归的年轻人（平均年龄= 22； 72％的男性），他们在过去30天内使用过任何类型的烟草制品。参与者是从洛杉矶县的12个服务站点和13个街道站点招募的。结果超过90％的年轻无家可归者烟草使用者报告了过去一个月大麻和烟草的共同使用：65％的人报告了任何共同使用（将两种物质混和在卷烟，关节，钝器，烟枪，水烟，烟斗或碗中）和27％的报告仅单独使用它们。协方差分析的分析发现，与其他烟草使用者相比，共同管理者报告的吸烟量和使用频率更高，使用大麻的频率更高，在某些情况下，功能较差，无家可归的人更为严重（p <0.05）。Logistic回归分析表明，在黑人（与白人）和认为与吸烟相同或比吸烟有害的年轻人中，共同给药的可能性较小，但在与同龄人接触更多的年轻人中，共同给药的可能性更大共同给药（p <0.05）。结论烟草和大麻的共同管理在无家可归的年轻烟草使用者中普遍存在。