Table 1.
Prevalence Rates for Substance Abuse and Dependence
| Substance | Grendon N = 118 | Aylesbury N = 37 | Minnesota N = 6,881 | |||
| Abuse | Dependence | Abuse | Dependence | Abuse | Dependence | |
| Alcohol | 3% | 45% | 2% | 86% | 16% | 29% |
| Marijuana | 3% | 23% | 5% | 81% | 13% | 18% |
| Cocaine | 3% | 41% | 8% | 79% | 4% | 9% |
| Heroin | 3% | 27% | 5% | 24% | <1% | 2% |
| Stimulants | 4% | 11% | 22% | 27% | 4% | 12% |
| Maximum Diagnosis * | 3% | 75% | 0% | 97% | 21% | 52% |
* Maximum diagnosis refers to the proportion of cases with any dependence or abuse only diagnosis where a diagnosis of dependence for any substance overrides a diagnosis of abuse for another substance.