TABLE 7.
Prospective study participants: Lifetime characteristics based on summary assessment across all data collection waves.
| Case families | Comparison families | |
|---|---|---|
| 3203 | 512 | |
| Most recent age, mean age (sd) | 23.5 (5.5) | 22.5 (5.7) |
| Education—highest # years completed (mean, sd) | 12.8 (2.4) | 13.2 (2.9) |
| Mean # waves | 4.1, median = 4 | 4.4, median = 4 |
| Substance use (n, %) | ||
| Ever had a drink | 2794 (87.2) | 387 (75.6) |
| Mean age first drink (sd) | 15.7 (2.7) | 16.3 (2.6) |
| Ever intoxicated | 2533 (79.1) | 335 (65.4) |
| Mean age first intoxication (sd) | 16.7 (2.6) | 17.5 (2.2) |
| Smoked 100+ cigarettes | 1158 (36.2) | 89 (17.4) |
| Ever use cannabis | 2306 (72.0) | 258 (50.4) |
| Mean age first cannabis use (sd) | 16.0 (3.0) | 17.1 (2.8) |
| DSM‐4 Substance dependence (n, %) | ||
| Alcohol | 601 (18.8) | 45 (8.8) |
| Cannabis | 700 (21.9) | 49 (9.6) |
| Cocaine | 125 (3.9) | 4 (0.8) |
| Other stimulants | 105 (3.3) | 4 (0.8) |
| Opiates | 133 (4.2) | 6 (1.2) |
| Sedatives | 55 (1.7) | 6 (1.2) |
| Tobacco | 756 (23.6) | 46 (9.0) |
| Non substance diagnoses & suicidality (n, %) | ||
| Major depression | 1183 (37.0) | 144 (28.1) |
| Conduct disorder | 544 (17.0) | 34 (6.6) |
| ASPD | 392 (12.2) | 15 (2.9) |
| OCD | 53 (1.6) | 5 (2.9) |
| PTSD | 163 (5.1) | 8 (1.6) |
| Suicide attempt | 272 (8.5) | 26 (5.1) |