TABLE 1.
Characteristics of PWID who initiated NEP use in Tijuana, Mexico: 2006–2007
| Baseline characteristics | NEP Use N = 284 |
No NEP Use N = 196 |
Total N = 480 |
p-value |
|---|---|---|---|---|
| Sociodemographics | ||||
| Median age (IQR) | 37 (32, 43) | 39 (34, 44) | 37 (32, 43) | .02 |
| Female | 47 (16.5%) | 32 (16.3%) | 79 (16.5%) | .99 |
| Average monthly income ≥2500 pesosa | 193 (68.0%) | 152 (78.4%) | 345 (72.2%) | .01 |
| Resides in Zona Norte | 68 (23.9%) | 65 (33.2%) | 133 (27.7%) | .03 |
| Social influence | ||||
| Family members ever used drugs | 109 (39.4%) | 49 (25.9%) | 158 (33.9%) | <.01 |
| Median number of PWID in social network | 80 (41, 150) | 69 (40, 120) | 70 (40, 140) | .05 |
| Individual behaviors/risk | ||||
| Any receptive needle sharinga | 102 (35.9%) | 83 (42.3%) | 185 (38.5%) | .18 |
| Got syringe most often from pharmacista | 195 (68.7%) | 156 (79.6%) | 351 (73.1%) | <.01 |
| Injected heroin most oftena | 166 (58.5%) | 136 (69.4%) | 302 (62.9%) | .02 |
| Injected at least once dailya | 246 (86.6%) | 182 (93.3%) | 428 (89.4%) | .02 |
| Injected most often at shooting gallerya | 83 (29.2%) | 39 (19.9%) | 122 (25.4%) | .02 |
| Positive HIV serostatus | 15 (5.3%) | 10 (5.1%) | 25 (5.2%) | .99 |
| Syphilis >1.8 | 28 (5.9%) | 16 (5.7%) | 12 (6.9%) | .81 |
| Structural/Environmental factors | ||||
| Homelessa | 38 (13.4%) | 22 (11.2%) | 60 (12.5%) | .57 |
| Arrested in the past 6 months for having track marksb | 49 (27.2%) | 21 (17.2%) | 70 (23.2%) | .05 |
a
Last 6 months;
b
Among those arrested in the past 6 months (N = 302).