Steve Hicks School of Social Work, University of Texas at Austin, 1925 San Jacinto Blvd, Austin, TX 78712, United States.
Drug Alcohol Depend. 2018 Jan 1;182:19-26. doi: 10.1016/j.drugalcdep.2017.10.006. Epub 2017 Nov 7.
This study examined factors associated with marijuana use initiation among never users, prior-to-past year user who return to use, and users who continue use over a 12-month follow-up period.
Two waves (W1 and W2) of the Population Assessment of Tobacco and Health (PATH) Study provided data (N=26,204 aged 18+). Multivariable logistic regression models were used to examine associations of W1 sociodemographic, health/mental health, and other substance use characteristics with W2 use status. As applicable, marijuana initiation age, use frequency, and use problems were also examined.
At W2, 2.36% and 10.42% of W1 never users and prior-to-past year users, respectively, reported having used marijuana, and 72.54% of W1 past-year users reported continued use. Those in the 18-24 age group were most likely to initiate, resume, or continue use. Among never and prior-to-past year users, those who reported more mental health problems at W1 also had greater odds of use at W2. Marijuana initiation and return to use were significantly associated with movement from nonuse to use of other substances. Continued marijuana use, as opposed to quitting, was also associated with other substance use, initiation of marijuana use prior to age 18, weekly or more frequent use (AOR=2.34, 95% CI=1.87-2.93), and use problems (AOR=1.40, 95% CI=1.05-1.85) reported at W1.
Movement between marijuana nonuse and use was substantial during the 12-month follow-up period. Early intervention to prevent initiation of, return to, and continued marijuana and other substance use, especially among young adults, is needed.
本研究调查了与从未使用者、过去一年曾使用者（现已恢复使用）和过去一年持续使用者在 12 个月随访期间开始使用大麻相关的因素。
人口评估烟草与健康（PATH）研究的两个波次（W1 和 W2）提供了数据（N=26204 名年龄在 18 岁及以上的人群）。使用多变量逻辑回归模型来检验 W1 社会人口统计学、健康/心理健康和其他物质使用特征与 W2 使用状况的关联。在适用的情况下，还检查了大麻起始年龄、使用频率和使用问题。
在 W2，分别有 2.36%和 10.42%的 W1 从未使用者和过去一年曾使用者报告使用过大麻，72.54%的 W1 过去一年使用者报告持续使用。18-24 岁年龄组最有可能开始、恢复或继续使用。在从未使用者和过去一年曾使用者中，W1 时报告心理健康问题较多的人在 W2 时也更有可能使用大麻。大麻的起始使用和恢复使用与从不使用到使用其他物质的转变显著相关。与戒断相比，持续使用大麻也与其他物质使用、18 岁前开始使用大麻、每周或更频繁使用（AOR=2.34，95%CI=1.87-2.93）以及 W1 时报告的使用问题（AOR=1.40，95%CI=1.05-1.85）相关。
在 12 个月的随访期间，大麻从不使用到使用的转变相当多。需要早期干预，以防止大麻和其他物质的使用开始、恢复和持续使用，特别是在年轻人中。
