|  | Yes | N (Total = 990) | Univariate Odds Ratio with 95% confidence interval | Mulitvariate Adjusted Odds Ratio with 95% confidence interval | |||
---|---|---|---|---|---|---|---|---|
Gender | Male | 263 | 755 | 35% | 1.0 | Â | 1.0 | Â |
 | Female | 102 | 235 | 43% | 1.4 | 1.1 – 1.9 | 1.7 | 1.2 – 2.4 |
Received prescribed substitute drug | Currently | 178 | 511 | 35% | 1.0 | Â | 1.0 | Â |
 | Previously | 150 | 322 | 47% | 1.6 | 1.2 – 2.2 | 1.7 | 1.3 – 2.4 |
 | Never | 37 | 157 | 24% | 0.6 | 0.4 – 0.9 | 0.9 | 0.5 – 1.3 |
Age in Years | <= 24 | 47 | 186 | 25% | 1.0 | Â | 1.0 | Â |
 | 25 – 29 | 103 | 273 | 38% | 1.8 | 1.2 – 2.7 | 1.6 | 1.0 – 2.6 |
 | 30 – 34 | 107 | 258 | 41% | 2.1 | 1.4 – 3.2 | 2.0 | 1.3 – 3.2 |
 | 35+ | 108 | 273 | 40% | 1.9 | 1.3 – 2.9 | 1.9 | 1.2 – 3.0 |
Inject into leg last 4 weeks | No | 212 | 701 | 30% | 1.0 | Â | 1.0 | Â |
 | Yes | 153 | 289 | 53% | 2.6 | 2.0 – 3.4 | 2.2 | 1.6 – 3.1 |
Inject into groin last 4 weeks | No | 176 | 543 | 32% | 1.0 | Â | 1.0 | Â |
 | Yes | 189 | 447 | 42% | 1.5 | 1.2 – 2.0 | 1.4 | 1.1 – 1.9 |
Inject into hand last 4 weeks | No | 245 | 759 | 32% | 1.0 | Â | 1.0 | Â |
 | Yes | 120 | 231 | 52% | 2.3 | 1.7 – 3.1 | 1.9 | 1.3 – 2.6 |
Clean Needle/Syringe for reuse | No | 77 | 259 | 30% | 1.0 | Â | 1.0 | Â |
 | Yes | 288 | 731 | 39% | 1.5 | 1.1 – 2.1 | 1.5 | 1.1 – 2.1 |
Inject crack last 4 weeks | No | 188 | 588 | 32% | 1.0 | Â | 1.0 | Â |
 | Yes | 177 | 402 | 44% | 1.7 | 1.3 – 2.2 | 1.5 | 1.1 – 2.0 |
Days injected last 4 weeks | <= 13 days | 46 | 181 | 25% | 1.0 | Â | 1.0 | Â |
 | 14 – 27 days | 84 | 208 | 40% | 2.0 | 1.3 – 3.1 | 1.8 | 1.2 – 2.9 |
 | 28 days | 235 | 601 | 39% | 1.9 | 1.3 – 2.7 | 1.5 | 1.0 – 2.3 |
Anti-HCV Positive | No | 135 | 454 | 30% | 1.0 | Â | 1.0 | Â |
 | Yes | 230 | 536 | 43% | 1.8 | 1.4 – 2.3 | 1.5 | 1.1 – 2.0 |
Homeless | Never | 36 | 140 | 26% | 1.0 |  | †|  |
 | Over a year ago | 98 | 266 | 37% | 1.7 | 1.1 – 2.7 |  |  |
 | In last year | 231 | 584 | 40% | 1.9 | 1.2 – 2.9 |  |  |
Number of years injecting | <= 4 | 53 | 210 | 25% | 1.0 |  | †|  |
 | 5 – 9 | 120 | 300 | 40% | 2.0 | 1.3 – 2.9 |  |  |
 | 10 – 14 | 87 | 227 | 38% | 1.8 | 1.2 – 2.8 |  |  |
 | 15 + | 105 | 253 | 42% | 2.1 | 1.4 – 3.1 |  |  |
Inject into neck last 4 weeks | No | 288 | 841 | 34% | 1.0 |  | †|  |
 | Yes | 77 | 149 | 52% | 2.1 | 1.4 – 2.9 |  |  |
Prepare drug using citric acid | No | 12 | 59 | 20% | 1.0 |  | †|  |
 | Yes | 353 | 931 | 38% | 2.4 | 1.3 – 4.6 |  |  |
Times injected last full day | Once | 53 | 168 | 32% | 1.0 |  | †|  |
 | Twice | 77 | 266 | 29% | 0.9 | 0.6 – 1.3 |  |  |
 | Thee times | 81 | 203 | 40% | 1.4 | 0.9 – 2.2 |  |  |
 | 4+ times | 154 | 353 | 44% | 1.7 | 1.1 – 2.5 |  |  |
Clean injecting site last 4 weeks | Never | 185 | 444 | 42% | 1.0 |  | †|  |
 | Sometimes | 83 | 224 | 37% | 0.8 | 0.6 – 1.1 |  |  |
 | Always | 97 | 322 | 30% | 0.6 | 0.4 – 0.8 |  |  |
Times injected with last needle | Once | 186 | 549 | 34% | 1.0 |  | †|  |
 | Twice | 68 | 189 | 36% | 1.1 | 0.8 – 1.5 |  |  |
 | Three times | 39 | 100 | 39% | 1.2 | 0.8 – 1.9 |  |  |
 | 4+ times | 72 | 152 | 47% | 1.8 | 1.2 – 2.5 |  |  |
Ever had voluntary confidential test for hepatitis C | Yes | 257 | 652 | 39% | 1.4 | 1.0 – 1.8 | †|  |
 | No | 108 | 338 | 32% | 1.0 |  |  |  |
Anti-HBc positive | No | 239 | 680 | 35% | 1.0 |  | †|  |
 | Yes | 126 | 310 | 41% | 1.3 | 1.0 – 1.7 |  |  |