TABLE 4—

Percentage Variance in the Odds of Testing Positive for HIV by Geographical Unit and Race/Ethnicity Among 9077 People Who Inject Drugs: 2009 National HIV Behavioral Surveillance System, United States

	Percentage Variance in HIV Apportioned to Geographical Units
Geographical Units	Non-Hispanic/Latino White (n = 2750)	Non-Hispanic/Latino Black (n = 4687)	Hispanic/Latino (n = 1640)	All PWID (n = 9077)
Zip code	4.3	0.0	0.0	4.3
County	0.2	6.9	0.0	7.1
Metropolitan statistical area	7.5	0.0	10.1	17.6
Total	12.0	6.9	10.1	29.0

Note. PWID = people who inject drugs.