Table 1.
Descriptive Characteristics of the Sample
| Variable | M(SD) or n% |
|---|---|
| Demographics at Time 1 | |
| Age | 20.7 (0.6) |
| Female n(%) | 135 (39.5%) |
| African-American n(%) | 11 (3.2%) |
| White n(%) | 121 (35.4%) |
| Multi-race/Other n(%) | 47 (13.7%) |
| Hispanic n(%) | 109 (31.9%) |
| Asian/Pacific Islander n(%) | 54 (15.8%) |
| Mother’s education – Did not finish high school n(%)a | 20 (5.9%) |
| Mother’s education – Finished high school or some college n(%)a | 87 (25.4%) |
| Mother’s education – Finished college or higher n(%)a | 225 (65.8%) |
| Currently attending college part- or full-time n(%) b | 280 (81.9%) |
| Straight sexual orientation n(%) | 289 (84.8%) |
| Age of initiation | |
| Age of marijuana initiation | 15.9 (2.1) |
| Age of tobacco/nicotine initiation | 15.9 (2.4) |
| Age of co-use initiation | 17.2 (2.2) |
| Marijuana Outcomes at Time 2 | |
| Frequency of marijuana use (past year) | 14.3 (7.9) |
| Quantity of marijuana use | 0.8 (1.0) |
| Marijuana consequences (past year) | 19.5 (11.2) |
| Cannabis use disorder screen | 2.6 (2.9) |
| Tobacco/nicotine Outcomes at Time 2 | |
| Frequency of cigarette use (past year) | 6.6 (7.8) |
| Quantity of cigarette use | 1.0 (2.5) |
| Frequency of e-cigarette use (past year) | 7.7 (8.7) |
| Quantity of e-cigarette use | 4.0 (8.5) |
| Cigarette dependence (time to first cigarette) | 3.6 (0.8) |
| E-cigarette dependence (time to first e-cigarette) | 3.0 (1.3) |
| Tobacco/nicotine and Marijuana Co-use Outcome at Time 2 | |
| Frequency of co-use (past year) | 0.7 (1.2) |
Note:
a
There were 10 participants (2.9%) who reported “Don’t Know” group for mother’s education
b
2 participants reported being currently enrolled in high school