Comparing sexual risks and patterns of alcohol and drug use between injection drug users (IDUs) and non-IDUs who report sexual partnerships with IDUs in St. Petersburg, Russia

Table 3 Associations between substance use practices and unprotected sex for IDUs and non-IDUs

	All participants	N = 396	IDUs	n = 331	Non-IDUS	n = 65
	uOR	aOR*⁴	uOR	aOR*⁴	uOR	aOR*⁴
Male	0.8 (0.5-1.2)		1.0 (0.5-1.3)		1.1 (0.4-3.3)
HIV	1.1 (0.7-1.8)		1.2 (0.7-2.0)		(insufficient n)
Log age	1.5 (0.6-3.7)		1.3 (0.4-3.9)		4.6 (0.5-45.8)*
Married/partnered	2.5 (1.6-3.9)***	2.5 (1.5-4.1)***	2.7 (1.7-4.5)***	2.4 (1.4-4.1)	1.9 (0.5-7.9)
Any casual partner	0.9 (0.6-1.4)		0.8 (0.5-1.3)		0.7 (0.2-2.8)
Injection drug use last 6 months	0.6 (0.3-1.1)**	0.4 (0.2-0.7)***	-		-
Meth use, injected or not, last 30 days *¹	1.9 (1.0-3.5)**	2.0 (1.1-3.9)**	1.9 (1.0-3.6)**	2.0 (1.0-3.9)***	2.8 (0.3-24.7)
Injected > 20 times/month	-		1.0 (0.7-1.6)		-
Unsafe injection last 30 days	-		2.1 (1.2-3.7)***		-
Risky alcohol use*²	1.1 (0.7-1.8)		0.9 (0.5-1.4)		6.7 (1.4-31.4)**	6.7 (1.4-31.4)**
Had sex when high on drugs or alcohol*³	3.7 (2.3-5.8)***	3.8 (2.4-6.3)***	4.8 (2.8-8.1)***	4.6 (2.7-7.8)***	1.8 (0.6-5.5)

* p< = 0.2
** p < = 0.05
*** p < = 0.01
*¹ 99% of methamphetamine use was in the form of injection among IDUs
*² determined by an at-risk AUDIT-C score
*³ had sex while participant or partner or both were drunk or high
*⁴ also controlled for education, employment, homelessness, incarceration, living with family and having legal income. These variables were not significant

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