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. Author manuscript; available in PMC: 2020 Mar 1.
Published in final edited form as: Int J Drug Policy. 2019 Jan 23;65:97–103. doi: 10.1016/j.drugpo.2018.10.010

Table 3.

State-level policy liberalism, adjusted predicted probability of state-level past year CU, and differences in past year prevalence of cannabis use

Adjusted predicted probability of State-
level past year CU+
Adjusted differences in past year prevalence of CU
by state policy liberalism
 
2004-2006 2010-2012 Model 1a
[Policy liberalism + Time period
+ state-level covariates]
Model 2a
[Model 1a + MCL]
Est. [SE] Est. [SE] Coef. [95% CI] Coef. [95% CI]
AGES 12-17
Policy Liberalism
 Conservative 13.72 [0.57] 12.91 [0.49] Ref Ref
 Moderate 14.31 [0.58] 13.49 [0.58] 0.58 [−0.67, 1.82] 0.34 [−0.90, 1.59]
 Liberal 15.69 [0.49] 14.87 [0.57] 1.96** [0.59, 3.32] 1.58* [0.19, 2.97]
Time Period
 2004-2006 Ref Ref
 2010-2012 -- -- −0.81 [−1.87, 0.24] −0.62 [−1.66, 0.43]
MCL Enacted
 No Ref
 Yes -- -- -- 1.29* [0.10, 2.47]
AGES 18-25
Policy Liberalism
 Conservative 27.87 [0.98] 28.27 [0.90] Ref Ref
 Moderate 29.89 [0.98] 30.29 [0.95] 2.02* [0.06, 3.97] 1.38 [−0.54, 3.30]
 Liberal 31.56 [0.90] 31.95 [1.00] 3.68** [1.32, 6.04] 2.96* [0.65, 5.27]
Time Period
 2004-2006 Ref Ref
 2010-2012 -- -- 0.40 [−1.25, 2.04] 0.85 [−0.76, 2.46]
MCL Enacted
 No Ref
 Yes -- -- -- 3.56*** [1.81, 5.32]
 
AGES 26+
Policy Liberalism
 Conservative 7.30 [0.45] 6.67 [0.39] Ref
 Moderate 7.68 [0.45] 7.04 [0.45] 0.37 [−0.59, 1.34] −0.06 [−0.98, 0.87]
 Liberal 8.62 [0.40] 7.99 [0.45] 1.32* [0.24, 2.39] 0.70 [−0.35, 1.73]
Time Period
 2004-2006 Ref Ref
 2010-2012 -- -- −0.63 [1.45, 0.18] −0.31 [−1.09, 0.47]
MCL Enacted
 No Ref
 Yes -- -- -- 2.15*** [1.27, 3.03]
 
*

p-value<0.05;

**

p-value<0.01;

***

p-value<0.001

+

From marginal

State-level demographic covariates included the state’s population total, percentage male, percentage white non-Hispanic individuals and percentage people ages 10-24. State-level economic covariates included the percentage of individuals 25 and over who completed high school, the state unemployment rate, and median household income. Data for these covariates were obtained from the U.S. Census Bureau in 2005 and 2010.