| Mobile sample | Landline sample | Dual-frame sample | |||
---|---|---|---|---|---|---|
 | Prevalence | 95% CI | Prevalence | 95% CI | Prevalence | 95% CI |
Risky drinking | 55% | (52% - 59%) | 51% | (47% - 55%) | 52% | (49% - 54%) |
Very risky drinking | 28% | (25% - 32%) | 24% | (20% - 28%) | 26% | (24% - 28%) |
Lifetime cannabis use | 40% | (37% - 44%) | 35% | (31% - 40%) | 37% | (35% - 40%) |
Recent cannabis use | 10% | (8% - 12%) | 8% | (4% - 11%) | 9% | (7% - 10%) |
Current smoking | 24% | (21% - 28%)* | 16% | (13% - 19%) | 21% | (19% - 23%)* |