Earlier HIV diagnosis--are mobile services the answer?

Area of Science:

• Public Health
• Epidemiology
• HIV/AIDS Research

Background:

• Facility-based HIV testing services (HTS) are crucial for early detection and treatment.
• Understanding demographic differences in HTS access is vital for targeted interventions.
• Mobile HTS may reach different populations than traditional clinic-based services.

Purpose of the Study:

• To compare age and gender demographics of clients accessing mobile versus facility-based HIV counselling and testing (HCT).
• To determine differences in HIV prevalence and baseline CD4 counts between mobile and facility-based HTS.
• To evaluate the effectiveness of mobile HTS in reaching specific populations and diagnosing HIV earlier.

Main Methods:

• A prospective, observational, cross-sectional study was conducted in Cape Town.
• Data on age, sex, HIV status, and CD4 counts were collected from August to December 2008.
• Three HIV testing services were compared: a mobile unit (Tutu Tester), a primary health care clinic, and a district hospital.

Main Results:

• A total of 3,820 individuals were tested across the three services.
• The mobile testing service attracted more men and older individuals compared to clinic-based services.
• HIV prevalence was significantly lower in the mobile service (5.9%) versus the clinic (18.0%) and hospital (23.3%).
• Mobile HTS clients diagnosed with HIV had higher CD4 counts (75% >350 cells/µl) compared to clinic (48%) and hospital (32%) clients.
• Adjusted risk for HIV positivity was 3.5-4.9 times higher in facility-based services compared to mobile services.

Conclusions:

• Mobile HIV testing services serve a distinct demographic profile, including more males and older individuals.
• Clients accessing mobile HTS are less likely to be HIV-positive and, if infected, present with earlier-stage disease.
• Mobile HTS demonstrates potential for reaching populations less engaged with facility-based testing and for earlier HIV diagnosis.