TABLE 2.

History of Prescription and Illicit Injection Drug Use, By Risk Group

Drug	All participants (N = 40) N (%)	Risky injection behavior* (n = 23) N (%)	Risky sexual behavior* (n = 30) N (%)	Neither risky behavior (n = 5) N (%)
Prescription Drug†
Opioids	40 (100)	23 (100)	30 (100)	5 (100)
Tranquilizer	12 (30)	7 (30)	10 (33)	2 (40)
Stimulant	5 (13)	4 (17)	2 (7)	1 (20)
Illicit Drug
Heroin	37 (93)	23 (100)	27 (90)	5 (100)
Cocaine	36 (90)	21 (55)	26 (87)	5 (100)
Methamphetamine	20 (50)	12 (52)	16 (53)	1 (20)
Ketamine	13 (33)	7 (30)	9 (30)	2 (40)

^*risk groups are not mutually exclusive.

^†study eligibility criteria required all participants to have injected prescription and/or illicit drugs.