Risk factors for HCV
| Characteristic | HCV seronegative, N=5214 (49%) | HCV seropositive, N=5448 (51%) |
| Mean age at survey (±SD) | 29±8 | 34±9 |
| <25 years, % | 35 | 16 |
| 25–29 years, % | 24 | 19 |
| 30–39 years, % | 29 | 37 |
| ≥40 years, % | 12 | 28 |
| Female, % | 33 | 35 |
| Indigenous, % | 8 | 10 |
| Mean age at first injection (±SD) | 20±6 | 19±6 |
| Mean years of injecting (±SD) | 9±7 | 15±9 |
| <5 years, % | 26 | 12 |
| 5–9 years, % | 28 | 21 |
| 10–16 years, % | 23 | 28 |
| ≥17 years, % | 14 | 40 |
| Ever been in prison, % | 17 | 33 |
| Been in prison last year, % | 11 | 22 |
| Drug injecting behaviours (last month) | ||
| Drug injected, % | ||
| Amphetamine/methamphetamine | 51 | 28 |
| Heroin | 35 | 48 |
| Cocaine | 3 | 5 |
| Methadone | 4 | 8 |
| Morphine | 7 | 9 |
| Buprenorphine | 1 | 2 |
| Others* | 9 | 8 |
| Injecting daily or more, % | 50 | 58 |
| Receptive sharing needle/syringe, % | 15 | 18 |
| Receptive sharing ancillary equipments†, % | 33 | 38 |
| Injected by another, % | 14 | 12 |
| New needle syringe in every injection | 72 | 68 |
| Injected in public | 46 | 52 |