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Table 3 Characteristics of drug injection by purpose of first injection 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

  First injection for sex First injection NON for sex Total p value
N = 59 (81.9%) N = 13 (18.1%) N = 72 (2.1%)
N % N % N %
First injection
Age: Median (1–3 IQR) 31.1 26.0–35.0 23.9 20.0–25.0 29.8 24.0–34.0 0.002**
Years since first injection        0.005
 ≤ 3 49 83.1 6 46.2 55 76.4  
> 3 10 17.0 7 53.9 17 23.6  
Who performed the injection        0.888
Self 17 28.8 4 30.8 21 29.2  
Other person 42 71.2 9 69.2 51 70.8  
Who was the injector        0.003
Stable partner 0 0.0 1 11.1 1 2.0  
Casual partner 27 64.3 1 11.1 28 54.9  
Friend/acquaintance 15 35.7 7 77.8 22 43.1  
Drug injected        < 0.001
Cocaine 0 0.0 2 15.4 2 2.8  
Heroine or other opiods 0 0.0 1 7.7 1 1.4  
Anphetamine (speed) 0 0.0 1 7.7 1 1.4  
MDMA 1 1.7 0 0.0 1 1.4  
Metanphetamine 19 32.2 4 30.8 23 31.9  
Mephedrone 37 62.7 0 0.0 37 51.4  
Ketamine (K, keta, kei) 1 1.7 1 7.7 2 2.8  
Others 1 1.7 4 30.8 5 6.9  
Lifetime injection
Number of days with an injection        0.405
1 19 32.2 7 53.8 26 36.1  
2–4 11 18.6 1 7.7 12 16.7  
5–19 12 20.3 3 23.1 15 20.8  
≥ 20 17 28.8 2 15.4 19 26.4  
Last injection        0.188
Last month 28 48.3 3 23.1 31 43.7  
Last 6 months 17 29.3 4 30.8 21 29.6  
Last 12 months 6 10.3 4 30.8 10 14.1  
> 12 months 7 12.1 2 15.4 9 12.7  
Drugs ever injected
Cocaine 2 3.4 4 30.8 6 8.3 < 0.001
Heroine or other opiods 1 1.7 1 7.7 2 2.8 0.234
Anphetamine 0 0.0 2 15.4 2 2.8 0.002
MDMA 2 3.4 1 7.7 3 4.2 0.482
Metanphetamine 27 45.8 4 30.8 31 43.1 0.323
Mephedrone 40 67.8 1 7.7 41 56.9 < 0.001
Ketamine 12 20.3 2 15.4 14 19.4 0.683
Others 3 5.1 4 30.8 7 9.7 0.005
Sharing drug or injection equipment
Ever shared        0.106
No 36 61.0 11 84.6 47 65.3  
Yes 23 39.0 2 15.4 25 34.7  
Last time shared        0.061
Last month 13 56.5 0 0.0 13 52.0  
Last 6 months 5 21.7 0 0.0 5 20.0  
More than 6 months 5 21.7 2 100.0 7 28.0  
With how many people        0.908
1 2 8.7 0 0.0 2 8.0  
2–4 10 43.5 1 50.0 11 44.0  
≥ 5 11 47.8 1 50.0 12 48.0  
Proportion with they shared for sex        0.009
All 19 82.6 0 0.0 19 76.0  
Not all 4 17.4 2 100.0 6 24.0  
  1. *MSM: men who have sex with men
  2. **Student's T Test