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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: Drug Alcohol Depend. 2015 Aug 10;155:134–140. doi: 10.1016/j.drugalcdep.2015.08.001

Table 2.

Multiple Regression Results for Cannabis Abstinence

Variable b SE β t p-value
Constant 2.72 5.74 0.47 0.64
Group 1.97 2.09 0.11 0.94 0.35
Age 0.14 0.08 0.19 1.71 0.09
Sex 0.90 1.93 0.05 0.47 0.64
Race −3.94 1.90 −0.23 −2.08 0.04
Cannabis Use −0.18 0.12 −0.17 −1.55 0.13
Tobacco Use 0.09 0.11 0.10 0.87 0.39

Note: Overall model: R = 0.39, F(6,79) = 2.35, p<.05. Group is current study (N = 32) vs. historical control (N = 54), Race is white vs. other, cannabis and tobacco use refer to the mean number of days of cannabis and tobacco use during the 30 days prior to intake).