Table 1.
Descriptive statistics on the levels of conduct problems in early adolescence and substance use in young adulthood.
| Phenotype | Response Categories | Prevalence | ||
|---|---|---|---|---|
| Males | Females | |||
| Conduct | 0 | No symptoms | 451 (48.2%) | 574 (63.7%) |
| 1 | 1–2 symptoms | 346 (37.0%) | 251 (27.9%) | |
| 2 | 3 or more symptoms | 138 (14.8%) | 76 (8.4%) | |
| Tobacco | 0 | No tobacco use | 256 (40.6%) | 380 (53.8%) |
| 1 | 1–5 cigarettes per day | 62 (9.8%) | 116 (16.4%) | |
| 2 | 6–10 cigarettes per day | 155 (24.6%) | 135 (19.1%) | |
| 3 | 11 or more cigarettes per day | 158 (25.0%) | 75 (10.6%) | |
| Alcohol | 0 | 0–2.5 drinks per week | 89 (14.0%) | 188 (26.6%) |
| 1 | 3–4.5 drinks per week | 72 (11.4%) | 131 (18.5%) | |
| 2 | 5–8.5 drinks per week | 93 (14.7%) | 232 (32.8%) | |
| 3 | 9–14.5 drinks per week | 189 (29.8%) | 123 (17.4%) | |
| 4 | 15 or more drinks per week | 191 (30.1%) | 33 (4.7%) | |
| Cannabis | 0 | Never used | 435 (69.0%) | 535 (76.1%) |
| 1 | Used 1–2 times in lifetime | 87 (13.8%) | 79 (11.2%) | |
| 2 | Used 3 times or more in lifetime | 108 (17.1%) | 89 (12.7%) |