. Author manuscript; available in PMC: 2016 Apr 1.

Published in final edited form as: Int J Drug Policy. 2015 Jan 14;26(4):336–344. doi: 10.1016/j.drugpo.2015.01.009

Table 3.

Marijuana Use and Attitudes from 2007–2013 as a Function of Time and California Residency among U.S. Students in 12^th Grade (Weighted). Unexponentiated Coefficients from Logistic Regression Equations, with Standard Errors in Parentheses

	30-Day Marijuana Prevalence	Annual Marijuana Prevalence	Lifetime Marijuana Prevalence	“Great risk” in regular marijuana use	Personal disapproval of regular marijuana use	Expect to use marijuana five years in future	Perceived availability of marijuana
Sample size	97,238	97,110	97,238	79,945	61,123	16,154	65,655

California Resident	.13 (.089)	.10 (.12)	.077 (.11)	−.061 (.074)	−.072 (.085)	.23^* (.099)	.19^** (.084)
Year of survey^a	.097^* (.042)	.017 (.011)	.0047 (.011)	−.090^** (.010)	−.055^** (.011)	.067^** (.015)	−.033^** (.013)
(Year of survey)²	−.012^† (.0066)
Year Rates Begin to Depart in California
(California)× (2010)		.11^* (.049)	.10^* (.048)
(California)× (2012)	.19^* (.086)			−.18^** (.057)	−.20^** (.072)	.22^† (.12)
Constant	−1.53^** (.056)	−.78^** (.039)	−.34^** (.037)	.29^** (.034)	.12^** (.036)	−1.82^** (.052)	1.61^** (.043)

Centered at year 2007

^†

p<.10

p<.05;

^**

p<.01 (all tests two-tailed)