Main epidemiological features of the study population
| At risk for infection with non-B subtypes | ||||
|---|---|---|---|---|
| No risk | Non-Africans | Africans | Total | |
| Number | 829 | 45 | 28 | 73 |
| Sex (male) | 642 | 35 | 13 | 48 |
| Mean age (years) (SD) | 38 (7) | 40 (6) | 37 (6) | 38 (6) |
| Risk group | ||||
| Injecting drug users | 452 | 10 | 0 | 10 |
| Homosexuals | 262 | 26 | 2 | 28 |
| Heterosexuals | 96 | 9 | 24 | 33 |
| Transfusion | 3 | 0 | 0 | 0 |
| Unknown | 14 | 0 | 2 | 2 |
| Non-B subtypes | 0/145 | 7 (15.5%) | 20 (71.4%) | 27 (37%) |