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. Author manuscript; available in PMC: 2015 Apr 21.
Published in final edited form as: Am J Addict. 2015 Mar;24(2):160–165. doi: 10.1111/ajad.12157

Table 2.

Results from generalized negative binomial mixed effects models of daily cognitive self-rating of impairments and minutes of marijuana use among male and female participants.

Variable B Std.Error t-value p-value
Time (Days −0.01 0.01 −1.50 0.13
Education≤12 0.07 0.80 0.09 0.92
Unemployed 0.88 0.75 1.17 0.24
Gender: Female 1.00 0.81 1.24 0.22
Baseline Days of Alcohol Use −0.01 0.07 −0.20 0.84
Minutes of Marijuana Use 0.004 0.001 2.76 0.006
Gender X Minutes of Marijuana Usea 0.002 0.003 0.61 0.54
a

Tested in separate model. Other parameters reflect model with no interaction term.