Table 1:

Characteristics of index participants

	Index participants (n=989)
Age, years	37 (31–42)
Sex
Female	485 (49%)
Male	504 (51%)
Marital status
Married	220 (22%)
Unmarried	769 (78%)
Region
Nairobi	532 (54%)
Coast	457 (46%)
Violence in past year
Physical	338 (34%)
Sexual	87 (9%)
Threatened	185 (19%)
Injection history and risk behaviours
Needle sharing in past month	68 (7%)
Equipment sharing in past month	106 (11%)
Time injecting drugs, years	5 (2–7)
Monthly frequency of injecting	60 (30–90)
Sexual encounters in past month	2(0–10)
Lifetime sexual partners	15 (6–50)
Condom use during last sexual intercourse*	553 (56%)
Transactional sex, ever†	760 (77%)
On methadone	228 (23%)
HIV and HCV data
HCV antibody positive	162 (16%)
HCV viraemia	73 (7%)
Previously treated with direct-acting antivirals	27 (3%)
Engaged in HIV care	855 (86%)
On antiretroviral therapy	800(81%)
Viral suppression of HIV	535 (68%)‡
Partners
Also enrolled as partner§	502 (51%)
Number of partners mentioned
1–5	723 (73%)
6–10	233 (24%)
>10	33 (3%)

Data are n (%) or median (IQR). Index participants were people who inject drugs and were living with HIV. HCV=hepatitis C virus.

^*Defined as vaginal, oral, or anal penetrative sex.

^†Defined as giving or receiving money or material goods in exchange for sex.

^‡Data were unavailable for 201 participants, so the denominator for this percentage calculation was 788.

^§Also named as partners and thus represented again in table 2.