Home testing proved workable across three African country settings
Home-based HIV and blood glucose self-testing, paired with household blood pressure measurement, performed far better than a convenience exercise. In peri-urban and rural communities in Kenya, South Africa, and Zambia, adults and adolescents aged 15 years and older were willing to test in their own homes, understand the procedures, and prefer this model over clinic-based testing. The study enrolled 526 participants from 100 households in each country, giving the results a practical footing across three distinct sub-Saharan African settings rather than a single community or site.
The case for home testing is straightforward. When clinic access is delayed by distance, transport cost, stigma, work schedules, or long queues, diagnostic contact often comes too late. In HIV, blood glucose, and blood pressure care, the point of entry is often the weakest link. If people do not test, they do not enter care, and if they do not enter care, the burden of untreated infection, diabetes, and hypertension accumulates quietly in households and communities.
Low recent HIV testing and hidden risk were common in the enrolled households
Baseline characteristics showed a population with substantial unmet screening needs. The average age was 41 years, 63% were female, and 16% of participants reported living with HIV. Even more striking, 52% said their last HIV test had been more than 12 months earlier or that they had never been tested, and 8% were unsure of their HIV status. Those figures matter because HIV testing frequency shapes the chance of earlier diagnosis, earlier antiretroviral initiation, and reduced onward transmission. A home-based model can lower the threshold for getting tested, especially for people who have not interacted recently with formal services.
Only 14% of participants reported any previous self-testing experience. Despite that limited familiarity, most people adapted quickly once given the tools and instructions. The data suggest that lack of prior exposure did not block uptake in this setting, which is important for programs trying to move self-testing beyond early adopters and into routine household use.
Usability was high for HIV and blood glucose self-testing
Among participants who performed self-testing, more than 90% rated all procedures for HIV and blood glucose as either “very easy” or “fairly easy.” In operational terms, that is a strong signal. A test may be clinically sound, but if the swab, strip, sample collection, or result interpretation feels confusing or intimidating, real-world adoption falls apart. Here, the procedure itself did not appear to be the barrier.
The study captured actual test outcomes rather than only attitudes. Among those who self-tested, 2% (6 of 330) tested positive for HIV, and 4% (18 of 469) had high blood glucose. Meanwhile, blood pressure measured by the study team was high in 26% (131 of 502) of participants. The blood pressure finding is especially important because hypertension often remains silent until vascular injury has already progressed. Home measurement can reveal risk that would otherwise remain invisible, particularly in settings where routine screening is inconsistent or opportunistic.
The combination of HIV, glycemic, and blood pressure findings points to a broader household screening opportunity. These are different diseases with different care pathways, yet they share a common problem: people often remain undiagnosed until symptoms or complications force contact with the health system. Bringing screening into the home compresses that delay.
Blood pressure screening exposed a larger burden than infection-focused testing alone
The divergence between blood pressure prevalence and the HIV or glucose positivity rates is clinically meaningful. Hypertension was the most common abnormal finding in the study, and that result reinforces how much cardiovascular risk can sit undetected in community settings. Blood pressure is also a condition that lends itself to repeated monitoring, making home-based measurement more than a one-time screening maneuver. Repeated readings can support confirmation, counseling, and referral, especially when health services are stretched.
This is where household-based testing becomes more than a convenience strategy. It creates a platform for early recognition of chronic disease in environments where clinic attendance may be episodic. For health systems in low- and middle-income countries, that has direct implications for screening coverage, task sharing, and linkage to care. The clinical value lies not only in detecting known disease but in identifying the silent majority who have not yet crossed the threshold into treatment pathways.
Preference for home testing was strong and crossed disease categories
Most participants — 87% or 458 of 526 — preferred home-based testing. Preference is not a soft endpoint. In implementation science, willingness to return to a model often determines whether an intervention can scale. A method that is accurate but disliked will struggle to survive routine use; a method that is acceptable and easy to repeat has a real chance of being integrated into community programs.
Preference also has a behavioral dimension. Home testing can reduce stigma around HIV screening, lower the logistical burden of chronic disease assessment, and place the testing experience in a familiar environment. That setting may improve honest engagement with results, especially when the alternative is navigating a busy clinic for tests that feel personal or sensitive.
Zambia pointed to promise, but the testing approach was not identical across countries
The findings from Zambia were encouraging but less complete because HIV testing there was staff-administered rather than self-administered. As a result, the Zambian experience does not map perfectly onto the self-testing model used in Kenya and South Africa. Even so, the broader household experience still suggested promise for home-based testing.
This difference matters because program design influences what can be concluded about feasibility. A household model built around direct self-testing requires clear instructions, user confidence, and reliable result interpretation. When staff perform part of the process, some of those usability questions shift. The Zambia data therefore support feasibility, but they do not answer every question about user-led HIV testing in that setting.
The study does not claim that home testing replaces clinical care. It shows something more immediate and operational: people in peri-urban and rural communities can use and prefer household testing for HIV and blood glucose, and they can participate in home blood pressure assessment with a high degree of acceptance. For health systems trying to reach populations that have not been screened recently, that is a concrete pathway toward earlier detection and more timely linkage to care.