Table.

Demographic characteristics of study sample (N=26).

	n	%
Age (mean; SD)	42.9 (9.2)
	Range: 22–60
Age at initiation of IDU (mean; SD)	22.3 (9.0)
Female	14	54%
Race/Ethnicity
Hispanic/Latino	12	46%
White	6	23%
African American	5	19%
Other	3	12%
Homeless	20	77%
Education: at least high school graduate	8	31%
HIV Positive* (n=25)	3	12%
HCV Positive* (n=24)	16	67%
Drug most frequently injected in past 30 days: Heroin	25	96%
Number of injections per day (mean; SD)	4.2 (2.1)
Number of days per week on which drugs are injected (mean; SD)	6.4 (1.5)
Duration of SEP use (years; mean; SD)	5.8 (4.7)

^*self-report