Table 3.
Characteristics of drug injection by purpose of first injection among MSM* in Madrid and Barcelona
| 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 | |
*MSM: men who have sex with men
**Student's T Test