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The prevalence of registration for cannabis, stimulants and sedative abuse in the general population, MZ and DZ twins and near.
| General population (%) | MZ twin (%) | DZ twins (%) | Siblings (%) | |
|---|---|---|---|---|
| Cannabis | 2.2 | 1.0 | 1.2 | 1.9 |
| Stimulants | 1.7 | 0.7 | 0.6 | 1.4 |
| Sedatives | 1.0 | 0.5 | 0.5 | 0.9 |
