Table 4.
Proportion traveled and adjusted odds with 95% confidence intervals for each variable for which there was interaction with age or years injecting. Stratified odds ratios are adjusted for age, race, sex, and years injecting in logistic regression models.
| Variable | Overall | Traveled in the prior 3 months |
Did not travel in the prior 3 months |
p-value (unadjusted) |
Adjusted OR for travel (95% CI) |
|---|---|---|---|---|---|
| Used (injected/snorted/smoked) methamphetamine, among those under age 22.5 (n=178) Yes No |
70.8% 29.2% |
70.4% 29.6% |
71.7% 28.3% |
0.86 |
0.95 (0.46-1.97) --- |
| Used (injected/snorted/smoked) methamphetamine, among those age 22.5 and older (n=177) Yes No |
72.3% 27.7% |
63.5% 36.5% |
82.7% 17.3% |
<0.01 |
0.34 (0.17-0.71) --- |
| Pooled money to buy drugs among those injecting for <5 years (n=173) Yes No |
80.2% 19.8% |
88.8% 11.2% |
62.5% 37.5% |
<0.01 |
4.56 (2.00-10.41) --- |
| Pooled money to buy drugs among those injecting for ≥5 years (n=182) Yes No |
77.5% 22.5% |
83.8% 16.2% |
68.8% 31.2% |
0.02 |
2.26 (1.09-4.70) --- |
| Syringe was backloaded among those under age 22.5 (n=178) Yes No |
56.9% 43.1% |
63.6% 36.4% |
41.5% 58.5% |
<0.01 |
2.35 (1.19-4.67) --- |
| Syringe was backloaded among those age 22.5 and older (n=177) Yes No |
56.8% 43.2% |
61.5% 38.5% |
51.3% 48.7% |
0.17 |
1.46 (0.79-2.70) --- |
| HCV antibody positive, among those younger than age 22.5 (n=178) Yes No |
25.4% 74.6% |
31.2% 68.9% |
11.8% 88.2% |
<0.01 |
3.21 (1.18-8.73) --- |
| HCV antibody positive, among those age 22.5 and older (n=177) Yes No |
42.1% 57.9% |
40.6% 59.4% |
43.8% 56.2% |
0.68 |
0.71 (0.37-1.40) --- |