Variables Estimates SE of Estimates OR 95% CI
Lower Upper
Age 0.02 0.02 1.02 0.99 1.06
Education 0.07 0.05 1.08 0.99 1.18
Knowledge about HIV infection** -0.72 0.12 0.49 0.38 0.62
Age at first drug use 0.01 0.03 1.01 0.96 1.06
Age at first sex -0.02 0.04 0.99 0.91 1.07
Hepatitis C* 2.59 0.30 12.54 7.03 22.35
Used condom at last sex* 0.78 0.33 2.18 1.15 4.15
Female drug use partner* 0.59 0.30 1.81 1.01  3.24
Multiple sexual partners in last 6 months -0.52 0.28 0.60 0.35 1.03
Polydrug use (heroin and amphetamines)* -0.59 0.28 0.55 0.32 0.96
Age at first heroin injection -0.02 0.03 0.98 0.93 1.03
Shared needle at last heroin injection* 0.87 0.35 2.38 1.19 4.74
Shared rinse water at last heroin injection** 0.98 0.31 2.67 1.47 4.90
Penis beads** 0.91 0.29 2.47 1.40 4.36
Note: SE = Standard Error; OR = Odds Ratio; CI = confidence interval
Pseudo Nagelkerke R2 = 0.58
*p <0 .05;**p <0 .01.
Table 2: Multinomial Logistic Regression Analysis Associating HIV seropositivity with demographics, risk behavior and penis beads (n=515).
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