. Author manuscript; available in PMC: 2011 Jul 1.

Published in final edited form as: AIDS Behav. 2011 Jul;15(5):1003–1010. doi: 10.1007/s10461-010-9816-7

Table 2.

Final multivariate logistic model estimates measuring associations between network characteristics and high-risk behaviors associated with HIV transmission for male and female IDU in St. Petersburg, Russia

Network characteristic	High risk injection practices	Not tested for HIV
Males
Trust
High	2.87 (1.06, 7.81)^*	1.39 (0.36, 5.41)^a
Low	1.0	1.0
Size
≥3	4.21 (1.54, 11.51)^*^b	1.92 (0.50, 7.33)^a
< 3	1.0	1.0
Stranger present
Yes	2.37 (0.80, 7.00)^b	16.67 (1.89, 147.12)^*^a
No	1.0	1.0
Females
Trust
High	4.89 (1.20, 19.94)^*	1.75 (0.37, 9.66)^a
Low	1.0	1.0
Size
≥3	4.80 (1.05, 21.94)^*^b	6.34 (1.03, 39.03)^*^a
< 3	1.0	1.0
Stranger present
Yes	NML^c	2.14 (0.15, 31.20)^a
No	1.0	1.0

Models adjusted for duration of drug use

Models adjusted for methamphetamine use

NML no maximum likelihood estimate calculated due to quasi-complete separation of data points (all females who had injected in the presence of a stranger had engaged in high-risk injection practices)

P < 0.05