Evaluation of the Impact of National HIV Testing Day — United States, 2011–2014

Human immunodeficiency virus (HIV) testing is the first step in the continuum of HIV prevention, care, and treatment services, without which, gaps in HIV diagnosis cannot be addressed. National HIV testing campaigns are useful for promoting HIV testing among large numbers of persons. However, the impact of such campaigns on identification of new HIV-positive diagnoses is unclear. To assess whether National HIV Testing Day (NHTD, June 27) was effective in identifying new HIV-positive diagnoses, National HIV Prevention Program Monitoring and Evaluation (NHM&E) data for CDC-funded testing events conducted during 2011–2014 were analyzed. The number of HIV testing events and new HIV-positive diagnoses during June of each year were compared with those in other months by demographics and target populations. The number of HIV testing events and new HIV-positive diagnoses were also compared for each day leading up to and after NHTD in June and July of each year. New HIV-positive diagnoses peaked in June relative to other months and specifically on NHTD. During 2011–2014, NHTD had a substantial impact on increasing the number of persons who knew their HIV status and in diagnosing new HIV infections. NHTD also proved effective in reaching persons at high risk disproportionately affected by HIV, including African American (black) men, men who have sex with men (MSM), and transgender persons. Promoting NHTD can successfully increase the number of new HIV-positive diagnoses, including HIV infections among target populations at high risk for HIV infection.

After two decades of campaigns promoting the annual NHTD, it is important to know whether these efforts have resulted in an increase in the number of new HIV diagnoses and whether persons at highest risk for HIV infection are effectively reached. NHTD includes approximately 400 events across the United States, spanning several days. The primary goal is to promote HIV testing, an essential step in the diagnosis of HIV, linkage to antiretroviral therapy, and prevention of new infections (1,2). This goal aligns with the National HIV/AIDS Strategy focused on reducing HIV infections, optimizing health outcomes, and decreasing disparities (3). Among persons disproportionately affected, blacks account for approximately half of all newly identified HIV-positive persons, and gay, bisexual, and other MSM are more severely affected by HIV than any other group (4–6). In 2010, HIV testing during the week of NHTD indicated both an increase in CDC-funded HIV testing events and new HIV diagnoses compared with 2 control weeks (7).

To evaluate whether NHTD campaigns have been successful at increasing the number of persons who know their HIV status, test-level data from the NHM&E data system were extracted and analyzed for the years 2011–2014. Data submitted by 55 grantees in 2011, 59 in 2012, 61 in 2013, and 60 in 2014 from CDC-funded jurisdictions in the United States, Puerto Rico, and the U.S. Virgin Islands were included. Analysis of valid HIV testing event data was conducted. A valid HIV testing event was defined as an event in which either HIV test technology or an HIV test result was reported. A single testing event included one test (i.e., a single rapid test or single conventional test) or more tests (i.e., single rapid test followed by a single conventional test) conducted to determine a person’s HIV status. An HIV-positive testing event for a person who was not reported previously as testing positive for HIV was categorized as a newly identified HIV infection. The number of HIV testing events conducted during the month of June was compared with the number of HIV testing events conducted during all remaining months of the year (i.e., January–May and July–December). A chi-square test was used to detect differences between the number of HIV testing events conducted in June and the average number of HIV testing events conducted during the remainder of the year. A p-value <0.05 was considered statistically significant. The differences in the number of testing events and newly identified HIV infections were analyzed by selected demographic characteristics, including age, sex, gender, sexual orientation, race/ethnicity, and risk behaviors. The number of newly identified HIV-positive persons identified each day during the 2 weeks before and after June 27th were compared to determine whether there was an increase on NHTD and to examine testing trends leading up to and after NHTD.

A total of 13,051,035 CDC-funded HIV testing events were conducted during 2011–2014, including 3,299,690 (2011); 3,287,024 (2012); 3,343,633 (2013); and 3,120,688 (2014). The numbers of new HIV-positive test results were 17,216 (0.52%) for 2011; 16,976 (0.52%) for 2012; 17,426 (0.52%) for 2013; and 16,530 (0.53%) for 2014. The number of testing events peaked in June compared with the mean during January–May and July–December for each year during 2011–2014, and the mean number of newly identified HIV-positive persons increased significantly during June (p<0.001) compared with January–May and July–December (Figure 1). When the number of new HIV infections diagnosed each day during the 2 weeks before and after NHTD was compared with new HIV infections diagnosed on June 27, the annual national testing event identified the largest number of new HIV infections compared with any of the other days (Figure 2). New HIV infections identified on NHTD, compared with those identified on the next highest day, increased 25% in 2011, 40% in 2012, 20% in 2013, and 17% in 2014 (Figure 2). The increase in total HIV testing events and the number of newly identified HIV infections was significant for persons aged ≥20 years; for all sex and gender groups (male, female, and transgender); MSM and heterosexuals; and white, black and Hispanic/Latino racial/ethnic groups (Table). MSM identified as white, black, or Hispanic/Latino experienced a significant increase in testing events and newly identified HIV-positive persons in June (Table).

Corresponding author: NaTasha Hollis, nhollis@cdc.gov, 404-718-8636.

¹Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, CDC.

References

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FIGURE 1. Newly identified HIV infections, by month — CDC-funded HIV testing sites, 2011–2014

Abbreviation: HIV = human immunodeficiency virus.

FIGURE 2. Newly identified HIV infections during the 2 weeks before and after National HIV Testing Day (NHTD, June 27), by date — CDC-funded HIV testing sites, 2011–2014

Abbreviation: HIV = human immunodeficiency virus.

TABLE. Number of HIV testing events and HIV positivity for selected characteristics conducted by health departments providing test-level data in the United States, Puerto Rico and the U.S. Virgin Islands, 2011–2014

Abbreviation: HIV = human immunodeficiency virus.
* The sum of the average during January–May and July–December over 3 years (2011–2014).
^† Includes invalid and/or missing values that are needed to determine age.
^§ Includes other specified, declined/not asked, or invalid/missing.
^¶ Includes multirace, Asian, American Indian, Alaskan Native, Native Hawaiian, or Pacific Islander.
** Includes declined, don’t know/not asked, invalid/missing.
^†† Data to identify target populations are required for all testing events conducted in non-health care settings and only HIV-positive testing events in health care settings.