Table 3.

Event-level analyses of sharing a high dead space syringe at last injection (injection episodes n=392)

General characteristics	OR (95% CI)	p-value	AOR (95% CI)	p-value
Age of study participant	0.99 (0.96, 1.03)	0.743
African American	2.69 (1.08, 6.69)	0.034	3.12 (1.16, 8.38)	0.024
Non-Hispanic white	0.43 (0.17, 1.07)	0.071
Male gender (female reference category)	0.72 (0.33, 1.57)	0.413
Recruited in a rural county	1.49 (0.56, 3.93)	0.423
# of years since first injection	1.02 (0.98, 1.06)	0.305
HIV positive	0.92 (0.23, 3.63)	0.904
Event-level characteristics
Age of injection partner	1.00 (0.98, 1.01)	0.550
Ever had sex with partner	1.46 (0.87, 2.46)	0.149	1.72 (0.83, 3.56)	0.145
Injected methamphetamine	2.32 (0.87, 6.2)	0.092	2.75 (0.88, 8.64)	0.083
Injected speedball (heroin & cocaine combination)	1.19 (0.57, 2.49)	0.644
Injected powder cocaine	1.12 (0.57, 2.17)	0.743
Injected crack cocaine	2.08 (1.18, 3.69)	0.012	2.44 (1.2, 4.97)	0.014
Injected heroin	1.00 (0.43, 2.31)	0.998
Injected non-medical prescription opioids	6.25 (1.41, 27.8)	0.016	6.57 (1.63, 26.51)	0.008
Syringe-mediated drug sharing (split liquefied drug solution)	7.77 (3.56, 17)	< 0.001	7.95 (3.32, 19.02)	< 0.001