Table 1.
Sample characteristics (n=2,539).
| Mean (SD) or N (%) | |
|---|---|
| Demographics at Baseline | |
| Age | 16.23 (0.74) |
| Sex | |
| Female | 1359 (53.7%) |
| Mother’s Education | |
| Did not finish high school | 326 (12.9%) |
| Graduated from high school | 389 (15.3%) |
| Some college | 429 (16.9%) |
| Graduated from college | 1105 (43.6%) |
| Don’t know | 287 (11.3%) |
| Race/ethnicity | |
| Non-Hispanic White | 533(21.0%) |
| Hispanic | 1115 (43.9%) |
| Asian | 532 (21.0%) |
| Other/Multiracial | 300 (11.8%) |
| In college at follow-up | 386 (15.2%) |
| Neighborhood Measures at Baseline | |
| Problems with Alcohol and Drugs | 2.34 (0.96) |
| Disorganization | 1.35 (0.50) |
| Cohesion | 3.20 (0.58) |
| Neighborhood disadvantage | −0.33 (0.65) |
| Potential Effect Modifiers at Baseline | |
| Parental Monitoring | 3.45 (0.62) |
| Resistance self-efficacy | |
| Alcohol | 3.21 (0.91) |
| Cigarette | 3.81 (0.55) |
| Marijuana | 3.48 (0.87) |
| Peer Affiliation | |
| Alcohol | 2.18 (1.06) |
| Cigarette | 1.62 (0.88) |
| Marijuana | 2.16 (1.11) |
| Past Year Use at Follow-up | |
| Alcohol | 839 (41.1%) |
| Cigarette | 233 (11.4%) |
| Marijuana | 563 (27.5%) |
| E-cigarette | 436 (21.3%) |
Notes: All means, standard deviations (SD) and percentages calculated among non-missing values