Table 4.
Study | Group of Co-Occurring Users | Comparison Group | Outcome | Statistic |
---|---|---|---|---|
de Dios, 2009 | Cannabis users + persistent tobacco smokers | Cannabis users + tobacco quitters | Adjusted odds ratio of cannabis relapse | 1.71* |
de Dios, 2009 | Cannabis users + tobacco initiators | Cannabis users + tobacco quitters | Adjusted odds ratio of cannabis relapse | 3.08* |
Gray, 2011 | Regular cannabis users + regular cigarette smokers | Regular cannabis users | Change in days of cannabis use from baseline to week 1 of treatment | β (slope) = -1.33 vs. -3.17* |
Gray, 2011 | Regular cannabis users + regular cigarette smokers | Regular cannabis users | Change in cannabis joints/day from baseline to week 1 of treatment | β (slope) = -1.15 vs. -2.34* |
Moore, 2001 | Current dependent cannabis users + cigarette smokers | Current dependent cannabis users + ex-cigarette smokers | % cannabis-negative urine tests during treatment | 24.4 vs. 49.4* |
Moore, 2001 | Current dependent cannabis users + cigarette smokers | Current dependent cannabis users + never-cigarette smokers | % cannabis-negative urine tests during treatment | 24.4 vs. 35.0 |
Moore, 2001 | Current dependent cannabis users + cigarette smokers | Current dependent cannabis users + ex-cigarette smokers | Mean weeks of continuous cannabis abstinence during treatment | 2.8 vs. 5.6* |
Moore, 2001 | Current dependent cannabis users + cigarette smokers | Current dependent cannabis users + never-cigarette smokers | Mean weeks of continuous cannabis abstinence during treatment | 2.8 vs. 3.7 |
Note. Asterisks indicate that co-occurring users reported significantly poorer outcomes than cannabis only users.