Table 2.

Characteristics of neighborhoods (colonias) of residence of mobile vs. less mobile IDUs (n=212)

Colonia characteristic	More mobile IDUs (n=51)	Less mobile IDUs (n=161)	P- value*	Odds Ratio	95% Confidence Interval
	%
Colonia considered high drug activity area by police	63.0	79.1	0.018	0.45	(0.23–0.88)
Health center present	25.5	22.2	0.623	1.20	(0.59–2.43)
Drug treatment center present	23.6	41.9	0.015	0.43	(0.20–0.90)
	Median %
Residents living in Tijuana at least 10 years	82.2	72.7	<0.001
Residents born in the state of Baja California	41.3	35.1	<0.001
Married	37.2	32.1	<0.001
Home ownership	60.9	44.4	<0.001
Female headed households	23.4	27.5	<0.001

^*Based on Pearson chi-square or Mann-Whitney U test