Prevalence and scale of cocaine use in Oslo as determined by combined population surveys and measurements of a cocaine metabolite in sewage
| Method | Annual Prevalence % (CI)* | Cocaine Consumption (Pure) | |
|---|---|---|---|
| Per-user g/year (CI) | Total population kg/year (CI) | ||
| Combined Population Survey (CPS) | 2.9 (2.6–3.2) | 9.8 (5.6–14.1) | 117 (70–165) |
| Sewage Analysis | |||
| Prevalence from CPS | 2.9 (2.6–3.2) | 6.4 (4.6–8.5) | 76 (60–91) |
| Per-user consumption from CPS | 1.9 (1.0–4.0) | 9.8 (5.6–14.1) | 76 (60–91) |
Direct measurements or estimates in bold. Derived estimates in italics.
*Population 15–64 years of age, 410 000 (source Statistics Norway).