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HIV Behavioral Surveillance in the Denver Metro Area

The National HIV Behavioral Surveillance (NHBS) system is funded by the Centers for Disease Control and Prevention (CDC) to monitor risk behaviors and access to HIV prevention services among three populations at risk for HIV:

Denver is one of 20 sites across the United States collecting NHBS data. Locally, NHBS is known as REACH (Risk Education Aimed at Community Health). REACH data is used to guide prevention, and HIV counseling and testing services in the Denver Metro area. NHBS data also provides a behavioral context for trends seen in HIV surveillance throughout the United States.

Sampling Methods and Sample Characteristics, REACH 2004-2013

Population Round 1 Round 2 Round 3
Men who have sex with men (MSM)
Data collection method
Total completed survey
Total HIV tests
HIV Prevalence
Prevalence of unrecognized HIV*
Dec 2004-Feb 2005
Venue based
869
Did not test
---
---
Aug - Nov 2008
Venue based
543
478
18.2%
12.9%
Aug - Nov 2011
Venue based
546
507
16.7%
14.1%
Injection drug users (IDU)
Data collection method
Total completed survey
Total HIV tests
HIV Prevalence
Prevalence of unrecognized HIV*
Jul 2005 - Feb 2006
Respondent driven
519
Did not test
---
---
Aug- Dec 2009
Respondent driven
432
429
4.7%
22.2%
Jul - Dec 2012
Respondent driven
517
515
6%
19.4%
Heterosexuals at increased risk (HET)
Data collection method
Total completed survey
Total HIV tests
HIV Prevalence
Prevalence of unrecognized HIV*
Jan - Oct 2007
Respondent driven
760
759
0.5%
75%
Aug - Nov 2010
Respondent driven
522
510
1%
20%
Jul - Dec 2013
Respondent driven
499
496
1.2%
16.7%

Note: * unrecognized HIV prevalence is defined as a person who self-reported being HIV negative, but tested positive.

During the 2009 IDU cycle, REACH received supplemental funds to test for hepatitis c virus. Of the 397 participants who were tested, 291 (73%) were antibody positive.

How NHBS is Conducted in Denver

All REACH participants complete a standardized anonymous questionnaire about HIV-related risk behaviors, HIV testing habits, and the use of HIV prevention services. Since 2007, all participants have also been offered HIV testing.

Contact REACH

For more information on NHBS in Denver, please email Alia Al-Tayyib, PhD, Denver Public Health. You may also visit the CDC's NHBS website .

Contact Denver Public Health

Denver Public Health

605 Bannock Street

Denver, CO 80204-4507

(303) 602-3700

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