Co-administration of tobacco/nicotine and marijuana (e.g., using both products on the same occasion by mixing them in the same delivery device) is a risky, yet common, form of co-use among young adults. Understanding motivations for co-administration co-use, and how these are associated with subsequent use and related problems, is needed to inform policy, prevention, and intervention efforts. We conducted a latent class analysis on 342 young adults with past-year co-administration of tobacco/nicotine and marijuana to determine how emergent classes of 16 co-use motives were associated with use and co-administration co-use of tobacco/nicotine and marijuana one year later. Four classes emerged: (1) a high all class that reported high endorsement of all motives, (2) a high coping class that reported high endorsement of co-use due to coping with stress and bad moods, (3) a high social/physiological reinforcement class that reported low endorsement of coping but high probability of social and relaxation motives and motives to even out effects of each substance, and (4) a low all class that reported low endorsement of all motives. The high all and high coping classes reported greater frequency and quantity of single substance use and co-administration. The high coping class reported more marijuana consequences than the low all class. The high all and high coping classes reported younger age of initiation of each individual substance and co-administration. Considering co-use motives may be useful in identifying those at highest risk for future use and consequences and tailoring interventions to the distinct needs of co-use subgroups. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

中文翻译：

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年轻人的烟草/尼古丁和大麻共同使用动机：与一年后物质使用行为的关联。


烟草/尼古丁和大麻的共同施用（例如，通过将两种产品混合在同一个输送装置中在同一场合使用这两种产品）是年轻人中一种危险但常见的共同使用形式。需要了解共同给药共同使用的动机，以及这些动机如何与后续使用和相关问题相关，以便为政策、预防和干预工作提供信息。我们对 342 名去年同时吸食烟草/尼古丁和大麻的年轻人进行了潜在类别分析，以确定 16 种共同使用动机的新兴类别如何与烟草/尼古丁和大麻的使用和共同施用相关。一年后吸食大麻。出现了四个类别：（1）高所有类别，报告对所有动机的高度认可，（2）高应对类别，报告由于应对压力和坏情绪而高度认可共同使用，（3）高社交/生理强化类报告对应对的认可度较低，但社交和放松动机以及平衡每种物质影响的动机的概率较高；(4) 低所有类报告对所有动机的认可度较低。高总体和高应对类别报告称单一物质使用和共同给药的频率和数量更高。高应对阶层报告的大麻后果比低所有阶层更多。高总体和高应对类别报告每种物质和联合给药的开始年龄较小。考虑共同使用动机可能有助于识别未来使用和后果风险最高的人群，并根据共同使用亚组的不同需求制定干预措施。 （PsycInfo 数据库记录 (c) 2020 APA，保留所有权利）。