. Author manuscript; available in PMC: 2012 Jan 15.

Published in final edited form as: Drug Alcohol Depend. 2011 Jan 15;113(2-3):236–241. doi: 10.1016/j.drugalcdep.2010.08.009

Table 1.

Social and mobility-associated characteristics of IDUs residing in Tijuana who have and have not injected with someone from the US (N=1056).

	Ever injected with someone from the US
	Yes (n=504; 48%)	No (n=552; 52%)	p-value

Ever traveled to US	483 (95.8%)	338 (61.2%)	<0.0001
Traveled to US in past year	49 (9.7%)	24 (4.4%)	0.34
Number of people you know who travel to US ≥ 1 time/year (median; IQR)	3.5 (0, 10.0)	3.0 (0, 6.0)	0.15
When you travel to US, do you hang out with people who use drugs?	272 (54.0%)	109 (19.8%)	<0.0001
Ever used drugs in the US	481 (95.4%)	128 (23.2%)	<0.0001
Deported from US to Tijuana	265 (52.6%)	148 (26.8%)	<0.0001

P-values obtained from Wald Chi-square from RDS-adjusted analyses.