Table 2.
Demographic and drug use characteristics of IDUs residing in Tijuana who have and have not injected with someone from the US (N=1056).
| Ever injected with someone from the US |
|||
|---|---|---|---|
| Yes (n=504; 48%) |
No (n=552; 52%) |
p-value | |
| Demographics | |||
| Race: | |||
| Latino/Hispanic | 396 (78.6%) | 467 (84.6%) | 0.26 |
| White | 7 (1.4%) | 3 (0.54%) | 0.99 |
| Black | 0 | 0 | -- |
| Indigenous | 10 (2.0%) | 15 (2.7%) | 0.71 |
| Education (middle school vs. less than middle school) |
145 (28.8%) | 76 (13.8%) | <0.0001 |
| Speak English | 335 (66.5%) | 175 (31.7%) | <0.0001 |
| Age (median; IQR) | 38.7 (33.2, 44.5) | 34.6 (29.6, 39.6) | <0.0001 |
| Age at first injection (median; IQR) | 19 (16, 23) | 21 (17, 28) | <0.0001 |
| Male (n, %) | 450 (89.3%) | 448 (81.2%) | 0.02 |
| Homeless | 67 (13.3%) | 73 (13.3%) | 0.09 |
| Lived in Tijuana for whole life | 104 (20.6%) | 146 (26.5%) | 0.03 |
| Ever been in jail, prison, adult detention |
482 (95.6%) | 474 (85.9%) | <0.0001 |
| HIV: antibody positive | 18 (3.6%) | 29 (5.3%) | 0.005 |
| Syphilis: antibody titers ≥ 1:8 | 65 (12.9%) | 98 (17.8%) | 0.39 |
| TB: IGRA positive (n=1020) | 304 (62.4%) | 377 (70.7%) | 0.11 |
| Drug Use & Injection Risk Behavior | |||
| Distributive syringe sharing (past 6 months) |
318 (63.1%) | 330 (59.8%) | 0.78 |
| Receptive syringe sharing (past 6 months) |
306 (60.7%) | 315 (57.1%) | 0.56 |
| Injects at least once per day | 422 (85.3%) | 428 (80.9%) | 0.45 |
| Usually injects with other people (past 6 months) |
391 (77.6%) | 441 (79.9%) | 0.45 |
| Drug most frequently injected (past 6 months) |
|||
| Heroin | 296 (58.9%) | 304 (55.5%) | 0.89 |
| Heroin & methamphetamine | 186 (37.1%) | 230 (42.0%) | 0.95 |
P-values obtained from Wald Chi-square from RDS-adjusted analyses.