Table 2.

Past-7-Day Illicit Opioid Use and HIV Risk Behaviors: Baseline and 2, 6 and 12 Months

	Referral	Brief intervention	Buprenorphine	p value
Days of self-reported illicit opioid use in the past 7 days,* mean (95% CI)
Baseline	5.3 (4.9–5.7)	5.6 (5.3–5.9)	5.3 (5.0–5.7)	0.40
2 Months	1.8 (1.2–2.4)	2.0 (1.4–2.6)	1.1 (0.7–1.5)	0.04
6 Months	1.5 (0.9–2.1)	2.0 (1.4–2.6)	1.6 (1.1–2.2)	0.54
12 Months	1.5 (0.9–2.1)	0.9 (0.5–1.4)	0.7 (0.3–1.2)	0.09
HIV risk behaviors,† mean (95% CI)
Baseline	8.7 (7.1–10.2)	9.4 (7.9–10.9)	9.4 (7.7–11.0)	0.78
2 Months	6.1 (4.6–7.6)	4.9 (3.8–6.1)	4.8 (3.7–5.9)	0.30
6 Months	5.4 (3.9–7.0)	5.3 (3.8–6.7)	4.4 (3.4–5.4)	0.45
12 Months	3.8 (2.7–4.9)	5.3 (3.9–6.8)	4.1 (3.1–5.2)	0.18

*Timeline follow-back method

^†HIV Risk Behavior Scale