TABLE 2.
Sample Characteristics | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | P |
Total | 11.2 | 11.8 | 13.2 | 12.5 | 12.5 | 12.2 | 11.9 | >.1 |
Age, y | ||||||||
18–19 | 13.5 | 13.2 | 16.3 | 15.4 | 14.1 | 15.2 | 14.2 | >.1 |
20–21 | 12.2 | 13.6 | 13.3 | 13.3 | 13.5 | 13.2 | 12.9 | >.1 |
22–23 | 10.4 | 10.7 | 11.9 | 10.8 | 12.0 | 10.9 | 9.9 | >.1 |
24–25 | 7.9 | 9.5 | 11.1 | 10.1 | 10.3 | 8.9 | 10.2 | >.1 |
Gender | ||||||||
Men | 17.0 | 18.0 | 20.2 | 19.1 | 19.4 | 19.1 | 18.0 | >.1 |
Women | 5.3 | 5.5 | 6.2 | 5.8 | 5.5 | 5.2 | 5.7 | >.1 |
Race | ||||||||
White non-Hispanic | 12.0 | 12.3 | 13.8 | 13.4 | 13.3 | 13.6 | 12.7 | >.1 |
Black non-Hispanic | 13.2 | 13.2 | 14.4 | 13.2 | 13.6 | 11.3 | 11.4 | .07 |
Hispanic | 6.8 | 9.0 | 10.1 | 9.1 | 8.9 | 8.0 | 9.4 | >.1 |
Population density | ||||||||
In a CBSA with ≥ 1 million persons | 10.4 | 10.9 | 12.7 | 11.9 | 12.1 | 11.9 | 11.5 | >.1 |
In a CBSA with < 1 million persons | 11.6 | 12.5 | 13.6 | 13.4 | 12.9 | 12.8 | 12.5 | >.1 |
Not in a CBSA | 11.9 | 12.4 | 13.6 | 11.5 | 13.5 | 10.7 | 10.6 | >.1 |
Total family income, $ | ||||||||
< 10 000–19 999 | 11.6 | 11.6 | 13.0 | 13.9 | 13.3 | 11.9 | 12.0 | >.1 |
20 000–49 999 | 10.1 | 11.0 | 12.4 | 11.3 | 11.3 | 11.2 | 10.9 | >.1 |
50 000–74 999 | 11.4 | 10.7 | 15.4 | 11.6 | 11.5 | 12.6 | 11.5 | >.1 |
≥ 75 000 | 12.8 | 15.0 | 13.8 | 13.1 | 14.2 | 14.2 | 13.7 | >.1 |
College enrollment when aged 18–22 y | ||||||||
Enrolled | 11.7 | 11.6 | 12.4 | 13.2 | 12.6 | 13.1 | 12.6 | .09 |
Not enrolled | 13.0 | 14.3 | 15.4 | 14.1 | 14.5 | 14.9 | 13.4 | >.1 |
Risk-taking behavior | ||||||||
Never | 5.7 | 6.6 | 5.9 | 5.8 | 6.2 | 5.8 | 5.8 | >.1 |
Seldom | 10.3 | 10.6 | 11.6 | 11.8 | 11.5 | 10.9 | 10.3 | >.1 |
Sometimes | 15.7 | 16.1 | 19.8 | 17.7 | 17.8 | 18.0 | 17.7 | >.1 |
Always | 24.0 | 25.7 | 28.3 | 27.3 | 26.5 | 26.1 | 25.5 | >.1 |
Usage in past 30 d | ||||||||
Cigarettes | 19.6 | 20.9 | 23.2 | 22.1 | 21.5 | 21.9 | 21.6 | >.1 |
Marijuana | 27.3 | 28.6 | 32.7 | 29.3 | 29.8 | 30.2 | 27.9 | >.1 |
Blunt | NA | NA | 41.1 | 37.7 | 36.1 | 37.2 | 33.9 | .03 |
Note. CBSA = core-based statistical area; NA = not available.
Data represent weighted prevalence estimates.