Table 1.
Prevalence of past 30-day cannabis usea among US adults with and without use of other substancesb, National Survey on Drug Use and Health, 2017–2018
| No cannabis use (last 30 days) N = 73,437 Wt% (95% CI) |
Cannabis use with other substance use N = 11,163 Wt% (95% CI) |
Cannabis-only use N = 980 Wt% (95% CI) |
Row total | |
|---|---|---|---|---|
| 18–25 | 77.8 (77.2, 78.4) | 20.2 (19.7, 20.9) | 2.0 (1.8, 2.2) | 100% |
| 26–49 | 87.7 (87.3, 88.2) | 11.6 (11.1, 11.9) | 0.7 (0.6, 0.9) | 100% |
| 50 and older | 95.1 (94.7, 95.5) | 4.3 (3.8, 4.7) | 0.6 (0.5, 0.8) | 100% |
| All adults | 89.7 (89.4, 90.0) | 9.4 (9.1, 9.7) | 0.9 (0.8, 1.0) | 100% |
aThe National Survey on Drug Use and Health (NSDUH) survey instrument uses the term “marijuana or hashish.” bOther substances included any past 30-day use of the following: any alcohol, tobacco (cigarettes, cigars, pipes, smokeless tobacco); illicit drugs (cocaine, crack, heroin, hallucinogens, LSD, PCP, ecstasy, ketamine, DMT/AMT/Foxy, Salvia, inhalants, methamphetamine); and pain medications, tranquilizers, stimulants, or sedatives (when use was not directed by a doctor)