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Table 1 Sample characteristics and bivariate analysis of factors associated with having ever injected drugs among MSM* in Madrid and Barcelona

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

  Sample characteristics (N = 3387) Prevalence of having ever injected drugs (2.1%) Crude prevalence ratio (95% CI**)
N % %
Recruitment
City of testing
Barcelona 1031 30.4 1.6 1.0  
Madrid 2356 69.6 2.4 1.5 0.9–2.7
Kind of testing program
STI diagnostic center 1642 48.5 1.7 1.0  
Comunity program 1745 51.5 2.5 1.5 0.9–2.4
Sociodemographics
Age (years)
 ≤ 24 559 16.5 2.0 1.3 0.6–3.0
25–39 1949 57.5 2.5 1.6 0.9–3.1
≥ 40 879 26.0 1.5 1.0  
Country of birth
Spain 2105 62.1 1.8 1.0  
Latin-America 927 27.4 3.0 1.7 1.0–2.7
Others 355 10.5 1.7 0.9 0.4–2.1
Years residing in Spain (for those born outside of Spain)
 ≤ 1 332 29.2 2.4   
2–4 281 24.7 2.9   
≥ 5 526 46.2 2.9   
Size of city of residence (last 12 months)
 ≤ 100.000 389 11.5 1.5 1.0  
100.000–1 million 434 12.9 1.8 1.2 0.4–3.4
> 1 million 2547 75.6 2.3 1.5 0.6–3.4
Level of education
Up to upper secondary 229 6.8 3.1 1.8 0.8–4.0
Post secondary 1129 33.5 2.7 1.5 0.9–2.5
University 2016 59.8 1.7 1.0  
Employment status (last 12 months)***
Employed 1737 74.1 2.3 1.0  
Unemployed 183 7.8 6.0 2.7 1.4–5.2
Others 424 18.1 1.4 0.6 0.3–1.5
Economic situation (last 12 months)
Comfortable/it is OK 2022 59.8 2.2 1.0  
Tight 1070 31.7 2.1 0.9 0.6–1.6
Dificult/very difficult 287 8.5 2.1 1.0 0.4–2.3
Cohabitation (last 12 months)***
Alone 947 40.4 2.9 1.0  
With some people 1400 59.6 2.1 0.7 0.4–1.2
Sexual and risk behavior
Gender of sex partners (ever)
Only men 2119 62.6 1.5 1.0  
Men and women 1268 37.4 3.2 2.1 1.3–3.3
Age at first sexual intercourse with another men (years)
< 16 596 17.6 3.5 7.3 1.7–31.0
16–20 1826 54.0 2.2 4.5 1.1–18.7
21–24 549 16.2 1.6 3.4 0.7–15.6
≥ 25 412 12.2 0.5 1.0  
Lives sex-life with men…
Not Openly 1297 38.5 1.4 1.0  
Openly 2075 61.5 2.6 1.9 1.1–3.2
Place where the largest number of partners were met
Dicos/clubs/bars 509 15.6 1.4   
Saunas 320 9.8 1.9   
Apps/websites 2093 64.2 1.8   
Cruising places 103 3.2 1.9   
Private parties 112 3.4 17.9   
Others/no search 122 3.7 0.0   
Place where the largest number of partners were met
Others 3147 96.6 1.7 1.0  
Private parties 112 3.4 17.9 10.8 6.5–18.1
Number of men penetrated by (ever)
None 178 5.3 0.6 1.0  
1–49 2345 69.2 1.3 2.4 0.3–17.2
≥ 50 864 25.5 4.6 8.2 1.1–59.9
Number of men penetrated by (last 12 months)
None 691 20.4 0.3 1.0  
≤ 5 1569 46.4 1.5 5.1 1.2–21.5
> 5 1123 33.2 4.2 14.5 3.5–59.5
Been paid for sex
Never 2660 78.6 1.5 1.0  
> 12 months ago 321 9.5 2.8 1.8 0.9–3.7
Last 12 months 405 12.0 5.4 3.5 2.1–5.9
Paid for sex
Never 2805 82.9 2.0 1.0  
> 12 months ago 290 8.6 2.1 1.0 0.4–2.4
Last 12 months 290 8.6 3.4 1.7 0.9–3.4
Ever injected steroids
No 3177 93.8 1.8 1.0  
Yes 210 6.2 6.7 3.7 2.0–6.5
History of HIV and other STI testing
Time since last HIV test
Never tested before 218 6.4 0.5 1.0  
< 6 months 1661 49.1 2.2 4.9 0.7–35.4
> 6 months 1502 44.4 2.3 4.9 0.7–36.0
HIV new diagnosis in this consultation
No 3253 97.5 2.0 1.0  
Yes 82 2.5 3.7 1.9 0.6–5.9
STI diagnosis (ever)
No 955 28.5 0.8 1.0  
Yes 2399 71.5 2.7 3.2 1.5–6.6
  1. *MSM: men who have sex with men
  2. **95% CI: 95% confidence interval
  3. ***These question were not included in Barcelona