Table 1. Individual-level socioeconomic and demographic characteristics of PWID associated with HIV infection in Thai Nguyen province, Vietnam.
| Number | HIV positive | OLS Univavriate Odds ratio of HIV infection (SE) | p-value (χ2) | |
| Age | ||||
| 18–30 | 391 | 30.7% | Ref | |
| 30–40 | 839 | 35.4% | 1.24 (0.16) | |
| >40 | 440 | 23.6% | 0.70 (0.11) | <0.001 |
| Monthly Income (USD) | ||||
| <$100 | 970 | 34.4% | Ref | |
| $100–200 | 528 | 25.3% | 0.68 (0.08) | |
| >$200 | 118 | 24.6% | 0.62 (0.14) | 0.002 |
| Education | ||||
| Primary | 169 | 35.5% | Ref | |
| Secondary | 802 | 35.7% | 1.00 (0.18) | |
| Graduated High school | 582 | 25.3% | 0.61 (0.11) | |
| College or higher | 118 | 23.7% | 0.57 (0.15) | <0.001 |
| Employment status | ||||
| Full-time | 872 | 29.3% | Ref | |
| Part-time | 183 | 33.2% | 1.20 (0.17) | |
| Unemployed | 83 | 44.3% | 1.92 (0.34) | |
| Retired, disability, student | 12 | 14.3% | 0.40 (0.31) | 0.001 |
| Using shared needle | ||||
| Never | 1,117 | 26.5% | ||
| Ever | 554 | 40.6% | 1.90 (0.21) | <0.001 |