Table 2.
Involvement Group | Alcohol | Nicotine | Cannabis | Cocaine | Opioids |
---|---|---|---|---|---|
No/Non-Regular Usea | 258 | 595 | 659 | 1591 | 2043 |
Use, 0 Symptoms | 517 | 159 | 1153 | 416 | 305 |
Use, 1–2 Symptoms | 591 | 499 | 312 | 83 | 45 |
Use, 3–5 Symptomsb | 648 | 1120 | 278 | 131 | 52 |
Use, 6–7 Symptoms | 559 | 180 | 168 | 348 | 124 |
aFor illicit drugs (i.e., cannabis, cocaine, and opioids), the lowest level of involvement included individuals who had never used that particular substance; for licit drugs (i.e., alcohol and nicotine), individuals who had also never used the substance regularly (i.e., drinking at least once per month for 6 months, or smoking 100+ cigarettes in one’s lifetime) were also included in the lowest involvement category. bSymptoms were not required to cluster within a 12-month period.