Table 1.
Descriptive statistics of drug use variables.
| Onset of weekly alcohol use |
Onset of heavy episodic drinking |
Smoking prevalence |
Marijuana prevalence |
|
|---|---|---|---|---|
| % weekly drinker (N users) | % heavy episodic drinking (N users) | % lifetime prevalence (N users) | % lifetime prevalence (N users) | |
| T1 N = 284 | 23.2% (66) | 13.7% (39) | 16.9% (48) | 5.3% (15) |
| T2 N = 209 | 29.5% (62) | 16.7% (35) | 20.9% (45) | 5.6% (12) |
| T3 N = 182 | 40.1% (73) | 25.3% (46) | 28.6% (36) | 7.9% (14) |
| T4 N = 195 | 58.5% (114) | 27.2% (53) | 24.6% (49) | 8.5% (17) |
Percentile values indicate the percentage of participants to indicate use of that specific substance above zero.