The impact of aspirin, statin therapy, and physical activity for the prevention of cardiovascular diseases in Africa from 2027 to 2056: a mathematical modelling study
This mathematical modeling study projects that implementing an integrated prevention strategy combining statins, aspirin, and physical activity across 12 African nations from 2027 to 2056 will avert millions of cardiovascular events and deaths while generating approximately $8.22 billion in healthcare cost savings, with physical activity promotion identified as the most impactful component.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Across the African continent, a quiet but growing health crisis is unfolding. While infectious diseases like malaria and tuberculosis have long dominated public health discussions, a different kind of threat is rising: heart disease and stroke. These conditions, often called cardiovascular diseases, are becoming more common as cities expand, diets change, and populations age. The challenge is not just that more people are getting sick, but that many health systems are not yet ready to treat them effectively. In many places, the tools to prevent these illnesses—simple medicines and advice on lifestyle—are available but underused. Understanding how to best use these tools to save lives and money is a question that affects millions of people, from the bustling streets of Lagos to the quiet villages of rural Malawi.
To answer this, a team of researchers from the University of Geneva and the Africa Centres for Disease Control and Prevention built a detailed computer simulation. They did not conduct a new survey of patients; instead, they used existing data from health surveys conducted between 2014 and 2019 in twelve different African countries. These surveys provided a snapshot of the health of over 60,000 adults, revealing how many people had high blood pressure, diabetes, or smoked, and how many were physically active. Using this real-world information, the researchers created a mathematical model to project what would happen over the next thirty years, from 2027 to 2056. They tested eight different scenarios, ranging from doing nothing new to combining various strategies, such as giving people aspirin, prescribing cholesterol-lowering drugs called statins, or encouraging people to move their bodies more through physical activity.
The results of this thirty-year projection are striking. The simulation suggests that the most powerful approach is not to choose just one solution, but to combine them. When the model assumed that countries would simultaneously promote physical activity, provide statins to those who need them, and offer aspirin therapy, the results were far better than any single strategy alone. This combined approach was projected to prevent nearly 12.6 million heart disease events and save almost 3.8 million lives over the three decades. It also showed a massive reduction in the burden of disability, measured in years of healthy life lost, and generated savings of approximately 8.22 billion US dollars in healthcare costs. The model indicates that these savings come from avoiding the expensive treatments required for heart attacks and strokes, rather than from the cost of the prevention programs themselves.
One of the most significant findings was the outsized role of physical activity. While medicines like statins and aspirin are well-known for their ability to lower risk, the simulation showed that promoting physical movement generated the largest health benefits on its own. In fact, strategies that included physical activity consistently outperformed those that relied only on drugs. The researchers found that encouraging people to meet recommended activity levels could prevent more heart events and deaths than using statins or aspirin alone. When physical activity was added to drug therapies, the benefits grew even larger, suggesting that movement and medicine work best as partners. The simulation also highlighted that these benefits are not spread evenly across the continent; countries with larger populations and higher baseline rates of heart disease, such as Algeria and Botswana, were projected to see the largest absolute numbers of lives saved, while the specific mix of strategies that worked best varied slightly by region.
The study also looked at the timing of these benefits. The simulation suggests that the greatest gains happen relatively early in the implementation of these programs. As coverage of these interventions increases, the number of prevented deaths and illnesses rises sharply, peaking as more people are reached. However, the researchers noted that even after this peak, the benefits continue to accumulate, preventing hundreds of thousands of events every year for decades. This pattern underscores a critical point: waiting to act would mean losing out on a significant portion of the potential health gains. The model assumes that countries can gradually increase the number of people receiving these interventions, reaching coverage levels that are ambitious but achievable with stronger health systems.
Despite the optimism of the numbers, the researchers were careful to note the limits of their work. The results are projections based on a computer model, not a record of what has already happened. The model relies on assumptions about how well people will stick to taking their medication or how successfully they will adopt new exercise habits. It also assumes that the effectiveness of combining these interventions is simply the sum of their individual parts, which might not perfectly reflect the complex reality of human behavior. Furthermore, the study did not include the costs of setting up the programs to deliver these medicines and exercise advice, meaning the reported financial savings might be slightly higher than the true net savings. Nevertheless, the consistency of the findings across thousands of simulated scenarios gives the researchers confidence that the general direction is correct.
The ultimate message from this work is one of urgency and integration. The simulation suggests that African nations do not need to choose between medicine and lifestyle changes; they need both. By weaving together the provision of essential drugs with community efforts to get people moving, health systems could potentially avert millions of future cases of heart disease. The tools to achieve this are known and available, but the study implies that realizing this potential requires immediate political will and coordinated action. The path forward involves tailoring these strategies to fit the specific needs of each country, recognizing that a plan for a large, urban nation might look different from one for a smaller, rural setting. The goal is to move beyond treating heart disease after it strikes and to build a system that prevents it from happening in the first place, securing a healthier future for the continent's growing population.
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