Risk factors for hepatitis C virus (HCV) infection among 719 patients in the cohort
| Risk factor | No (%) (n=719) |
| Intravenous drug abuse | 464 (64.5) |
| Receipt of blood components | 132 (18.4) |
| Non-professional tattoo | 17 (2.4) |
| Sex with drug user | 9 (1.3) |
| Health care worker | 12 (1.7) |
| Born outside UK | 23 (3.2) |
| Tattoos | 13 (1.8) |
| Non-professional ear piercing | 3 (0.4) |
| None of the above | 46 (6.4) |