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Table 4 Associations between substance use practices and unprotected sex within all partnerships*1 reported by IDUs and non-IDUs

From: 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

  All participants = 396   IDUs = 331   Non-IDUS = 65  
  Partnerships = 681   Partnerships = 541   Partnerships = 140  
  uOR aOR*5 uOR aOR*5 uOR aOR*5
Male 1.0 (0.7-1.5)   1.0 (0.6-1.5)   1.2 (0.5-2.9)  
HIV 1.1 (0.7-1.8)   1.2 (0.7-1.9)   3.0 (0.2-52.0)  
Log age 2.1 (0.9-4.8)*   1.5 (0.6-4.1)   6.1 (1.2-30.4)** 6.1 (1.2-30.4)**
Married/partnered 2.5 (1.7-3.7)*** 1.9 (1.2-2.9)*** 2.7 (1.7-4.2)*** 1.9 (1.2-3.1)*** 1.8 (0.7-4.9)  
Any casual partner 0.5 (0.4-0.7)*** 0.5 (0.4-0.7)*** 0.5 (0.3-0.7)*** 0.5 (0.3-0.7)*** 0.6 (0.3-1.1)*  
Injection drug use last 6 months 0.9 (0.5-1.4)   -   -  
Meth use, injected or not, last 30 days *2 1.7 (1.0-2.8)** 1.8 (1.1-3.2)** 1.7 (1.0-3.0)* 1.9 (1.0-3.5)** 1.6 (0.4-6.5)  
Injected > 20 times/month -   1.0 (0.6-1.5)   -  
Unsafe injection last 30 days -   2.0 (1.2-3.3)*** 1.8 (1.0-3.2)** -  
Risky alcohol use*3 1.0 (0.7-1.6)   0.9 (0.6-1.4)   3.0 (0.8-10.8)*  
Had sex when high on drugs or alcohol*4 2.4 (1.8-3.4)*** 2.2 (1.6-3.1)*** 3.1 (2.1-4.5)*** 2.5 (1.7-3.7)*** 1.2 (0.5-2.9)  
  1. * p< = 0.2
  2. ** p < = 0.05
  3. *** p < = 0.01
  4. *1 in GEE analysis limited to sexual partnerships reported by IDUs and non-IDUs
  5. *2 99% of methamphetamine use was in the form of injection among IDUs
  6. *3 determined by an at-risk AUDIT-C score
  7. *4 had sex while participant or partner or both were drunk or high
  8. *5 also controlled for education, employment, homelessness, incarceration, living with family and having legal income. These variables were not significant
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