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Table 2 Multivariate regression analysis of factors associated with having ever injected drugs among MSM* in Madrid and Barcelona (N = 3387)

From: Sexualized drug injection among men who have sex with men in Madrid and Barcelona as the first episode of drug injecting

  aPR** (95% CI***)
Number of men who had penetrated him (last 12 months)
None 1.0  
 ≤ 5 5.1 1.3–21.7
> 5 10.4 2.5–43.4
Place where the largest number of partners were met
Others 1.0  
Private parties 7.5 4.5–12.3
Ever injected steroids
No 1.0  
Yes 2.3 1.3–4.2
STI diagnosis (ever)
No 1.0  
Yes 2.2 1.1–4.6
Been paid for sex
Never 1.0  
> 12 months ago 1.3 0.7–2.7
Last 12 months 2.1 1.3–3.5
Gender of sex partners (ever)
Only men 1.0  
Men and women 2.0 1.3–3.1
  1. *MSM: men who have sex with men
  2. **aPR: adjusted Prevalence Ratio
  3. ***95% CI: 95% confidence interval