Table 1.
Characteristics of MSM in Tijuana, Mexico, 2012–2013 (n=191)
| Sample n | RDS population estimate | ||
|---|---|---|---|
| % | 95% CI | ||
| Demographics | |||
| Age, mean (SD) | 30 (9.0) | – | – |
| Gendera | |||
| Male | 176 | 93.8 | 88.9–98.7 |
| Transgender | 14 | 5.8 | 1.0–10.6 |
| Sexual orientation | |||
| Homosexual | 119 | 61.2 | 49.4–71.5 |
| Bisexual/heterosexual | 72 | 38.8 | 28.5–50.6 |
| Graduated high school or more | 104 | 50.1 | 39.4–61.3 |
| Employed | 112 | 56.8 | 47.0–68.9 |
| Monthly income more than 3500 pesos (~280 dollars) | 102 | 51.5 | 41.7–62.6 |
| Travel to the United States | |||
| Ever | 55 | 27.5 | 19.0–38.7 |
| Past year | 22 | 7.8 | 3.7–13.0 |
| Deported, ever | 14 | 3.6 | 1.4–6.7 |
| Jail, ever | 54 | 30.2 | 19.8–40.5 |
| Substance and alcohol use | |||
| Ever used | |||
| Marijuana | 96 | 53.8 | 42.5–64.0 |
| Cocaine | 53 | 32.6 | 20.5–42.3 |
| Methamphetamines | 54 | 29.6 | 19.0–40.0 |
| Amyl nitrate (poppers) | 32 | 15.9 | 8.8–26.6 |
| Used in the past month | |||
| Marijuana | 39 | 22.2 | 12.3–32.2 |
| Methamphetamines | 29 | 16.9 | 9.2–24.6 |
| Amyl nitrate (poppers) | 5 | 5.4 | 0.2–6.7 |
| Cocaine | 7 | 5.0 | 0.6–10.6 |
| Used intravenous drugs, ever | 10 | 6.3 | 1.2–12.8 |
| Used drugs before sex, past 2 months | 23 | 9.9 | 4.9–16.3 |
| Hazardous alcohol use | 77 | 33.3 | 24.2–43.7 |
| Used alcohol before sex, past 2 months | 76 | 34.7 | 25.3–43.9 |
| Sex-related variables, past 2 months | |||
| Sex partners, mean (SD) | 6.1 (10.8) | – | – |
| Unprotected receptive anal, mean (SD) | 2.6 (7.6) | – | – |
| Unprotected insertive anal, mean (SD) | 3.9 (13.1) | – | – |
| Male sexual partners | |||
| Spouse or live-in partner | 51 | 31.1 | 20.5–44.4 |
| Steady non-live-in partner | 111 | 57.9 | 47.2–68.9 |
| Casual partner | 98 | 44.3 | 34.3–54.3 |
| Anonymous partner | 56 | 25.2 | 26.7–35.0 |
| Female sexual partners | 44 | 26.7 | 17.3–37.4 |
| Sexual role in anal intercourse | |||
| Insertive only | 27 | 14.4 | 8.4–23.7 |
| Receptive only | 50 | 31.3 | 21.2–40.6 |
| Both | 88 | 41.9 | 31.4–52.6 |
| Transactional sex | |||
| Gave money for sex | 44 | 16.7 | 9.0–24.7 |
| Received money for sex | 26 | 12.0 | 5.3–20.9 |
| Had sex in a public venue | 48 | 22.1 | 14.0–31.2 |
| HIV and STI related | |||
| HIV or STI counselling, past 2 months | 28 | 12.0 | 6.0–18.5 |
| Circumcised | 33 | 14.8 | 8.8–22.6 |
| Self-reported gonorrhoea, past 2 months | 22 | 10.2 | 5.0–17.1 |
| Tested for HIV, ever | 135 | 63.7 | 53.2–74.5 |
| Tested for HIV, past year | 78 | 36.0 | 26.4–46.5 |
| Prevalence | |||
| HIV | 33 | 20.2 | 12.5–29.1 |
| Previously known HIV positive | 2 | 0.5 | 0.0–1.7 |
| Tested syphilis positive | 14 | 6.1 | 2.2–12.2 |
| Active syphilis (titer≥1:8) | 4 | 2.5 | 0.2–6.8 |
| Concurrent HIV/lifetime syphilis | 6 | 4.1 | 0.6–9.7 |
a
One participant refused to answer. RDS: respondent-driven sampling; SD: standard deviation; CI: confidence interval; STI: sexually transmitted disease.