Table 2.
Observed Prevalence of Marijuana-Related Behaviors and Attitudes among U.S. Students in 12th Grade, by Year and California Residency (Weighted), Standard Errors in Parentheses
| Outcome | ---Year--- | ||||||
|---|---|---|---|---|---|---|---|
| 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | |
| Marijuana use | |||||||
| Past 30 days (n=97,238) | |||||||
| California | .21 (.03) | .23 (.03) | .20 (.02) | .24 (.02) | .24 (.02) | .29** (.01) | .28** (.01) |
| Not California | .19 (.01) | .19 (.01) | .21 (.01) | .21 (.01) | .22 (.01) | .22 (.01) | .22 (.01) |
| Past 12 months (n=97,110) | |||||||
| California | .33 (.04) | .36 (.04) | .32 (.03) | .39* (.02) | .41* (.02) | .47** (.02) | .43** (.03) |
| Not California | .32 (.01) | .32 (.01) | .33 (.01) | .34 (.01) | .36 (.01) | .35 (.01) | .35 (.01) |
| Lifetime (n=97,238) | |||||||
| California | .42 (.04) | .45 (.03) | .43 (.02) | .49* (.02) | .51 (.02) | .55** (.02) | .51* (.03) |
| Not California | .42 (.01) | .42 (.01) | .42 (.01) | .43 (.01) | .45 (.01) | .44 (.01) | .45 (.01) |
| Perceive “great risk” in regular marijuana use (n=79,945) | |||||||
| California | 0.54 (.03) | 0.53 (.04) | 0.58 (.02) | 0.51 (.04) | 0.43 (.02) | 0.37** (.03) | 0.36** (.01) |
| Not California | 0.57 (.01) | 0.54 (.01) | 0.52 (.01) | 0.49 (.01) | 0.46 (.01) | 0.45 (.01) | 0.41 (.01) |
| Strongly disapprove of regular marijuana use (n=61,123) | |||||||
| California | 0.50 (.05) | 0.51 (.04) | 0.52 (.03) | 0.46 (.04) | 0.42 (.02) | 0.39** (.02) | 0.34** (.02) |
| Not California | 0.53 (.01) | 0.51 (.01) | 0.49 (.01) | 0.49 (.01) | 0.46 (.01) | 0.46 (.01) | 0.42 (.01) |
| Expect to use marijuana five years in the future (n=16,154) | |||||||
| California | 0.21* (.04) | 0.20 (.03) | 0.13 (.03) | 0.18 (.03) | 0.22 (.02) | 0.27** (.03) | 0.31** (.04) |
| Not California | 0.13 (.01) | 0.15 (.01) | 0.16 (.01) | 0.17 (.01) | 0.19 (.01) | 0.19 (.01) | 0.19 (.01) |
| Perceived availability of marijuana (n=65,655) | |||||||
| California | 0.84 (.03) | 0.85 (.01) | 0.81 (.01) | 0.84 (.01) | 0.85 (.02) | 0.89** (.01) | 0.86 (.03) |
| Not California | 0.84 (.01) | 0.84 (.01) | 0.83 (.01) | 0.83 (.01) | 0.83 (.01) | 0.82 (.01) | 0.82 (.01) |
Note: Reported sample sizes are unweighted.
*
p<.05; prevalence significantly different among California as compared to non-California residents in this year
**
p<.01; prevalence significantly different among California as compared to non-California residents in this year