Table 1.

Baseline cohort characteristics

Study	Location	Number	Eligible age range	Study period	OST uptake	SIF present	Homeless in the past 6 months (%)	Incarceration	HIV+ in sample (%)	Female (%)
Proyecto El Cuete IV	Tijuana, Mexico	750	18+	2010–2020	28 % ever	No	20	71 % ever	5	38
STAHR II	San Diego, USA	575	18+	2012–2016	23 % ever	No	55	78 % ever	10	26
V-DUSa	Vancouver, Canada	1735	18+	1996–2020	53 % ever	Yes	5	19 % ever	0d	31
COSINUSb	Paris, Marseille, Bordeaux, and Strasbourg, France	680	18+	2016–2018	–	Yesc	–	–	–	–

^aRefers to current VIDUS II sample (set to merge into V-DUS in 2016)

^bData collection to begin in Fall 2016

^cSIF likely to be implemented in Paris and Strasbourg in Fall 2016

^dAll VIDUS II participants are HIV-negative at baseline