Table 1.
The characteristics of HIV positive, non-heavily exposed HIV seronegative subjects (non-HESNs), HESNs and unexposed IDUs.
| Co-variates | HIV infected IDUs N = 172 | HIV uninfected IDUs N = 173 | ||
|---|---|---|---|---|
|
| ||||
| Non-HESNs N = 68 | HESNs N = 20 | Unexposed N = 85 | ||
| Gender | ||||
| Male (n; %) | 133; 77 | 58; 85 | 15; 75 | 66; 78 |
| Age | ||||
| Years [median (IQR)] | 30 (27–33) | 32 (24–37) | 28 (24–33) | 29 (24–33) |
| Duration of IVDU | ||||
| Years [median (IQR)] | 12.0 (10.0–15.0) | 12.0 (7.0–14.0) | 9.5 (4.5–14.5) | 9.0 (4.8–12.3) |
| Receptive syringe sharinga | ||||
| Yes | 133; 77% | 68; 100% | 20; 100% | 0 |
| Receptive syringes sharing during last six monthsb | ||||
| Never (n; %) | 96; 56 | 41; 60 | 0 | 85; 100 |
| <Once a month (n; %) | 35; 20 | 27; 40 | 0 | 0 |
| ≥Once a month (n; %)b | 41; 24 | 0 | 20; 100 | 0 |
| HCV serostatus | ||||
| HCV+ (n; %) | 169; 98 | 59; 87 | 16; 80 | 62; 73 |
| HBV serostatusc | ||||
| HBV+ (n; %) | 141; 89 | 43; 72 | 9; 56 | 39; 57 |
| Dual infection | ||||
| HCV+/HBV+ (n; %) | 140; 81 | 42; 62 | 8; 40 | 35; 41 |
Note: IQR – interquartile range.
a
Syringe sharing is categorized as persons who had ever injected with syringes that had been used by somebody else (receptive sharing).
b
Comprises the frequencies: 1–3 times a month (n = 14), once a week (n = 2), 2–3 times a week (n = 2), 4–6 times a week (n = 1) and once a day (n = 1).
c
Of HIV positive IDUs, non-HESNs, HESNs and unexposed 13, 9, 4 and 17 subjects, respectively, were vaccinated.