TABLE 2.
Univariate and multivariate factors associated with NEP initiation among PWID in Tijuana, Mexico
| Baseline characteristics | Relative risk (95%CI) | Adjusted relative risk (95%CI)c |
|---|---|---|
| Sociodemographics | ||
| Age (per year) | .99 (.98–1.01) | — |
| Female | .92 (.68–1.25) | — |
| Average monthly income >2500 pesosa,b | .74 (.58–.93) | .66 (.51–.85) |
| Social influence | ||
| Family members ever used drugsb | 1.36 (1.08–1.71) | 1.37 (1.06–1.77) |
| Number of IDUs in social network (per 10 people)b | 1.01 (1.00–1.01) | 1.01 (1.00–1.01) |
| Individual behaviors | ||
| Any receptive needle sharinga,b | .81 (.64–1.03) | .71 (.53–.95) |
| Got syringe most often from pharmacista,b | .70 (.55–.89) | .56 (.43–.73) |
| Got syringe most often from unsafe sourcea,b | .50 (.22–1.10) | .36 (.15–.87) |
| Injected heroin most oftena,b | .75 (.60–.93) | — |
| Injected at least once dailya,b | .66 (.49–.89) | — |
| Injected most often at shooting gallerya,b | 1.34 (1.06–1.70) | 1.54 (1.18–2.00) |
| Syphilis titer >1:8 | .88 (.58–1.35) | — |
| Positive HIV serostatus | .94 (.58–1.53) | — |
| Structural/Environmental factors | ||
| Homelessa | 1.24 (.91–1.69) | — |
| Arrested in the past 6 months for carrying used needle/syringe | 1.10 (.77–1.56) | — |
| Arrested in the past 6 months for carrying unused needle/syringe | 1.13 (.77–1.66) | — |
| Arrested in the past 6 months for having track marksb | 1.37 (1.01–1.86) | 1.38 (1.01–1.88) |
CI, confidence interval.
a
Refers to the past 6 months;
b
p-value ≤.10 in univariate model;
c
Adjusted for all variables that achieved p-value <.10 in univariate model.