South Africa is grappling with a severe public health emergency as diabetes solidifies its position as one of the nation's leading causes of death, according to Statistics South Africa.
This alarming situation is part of a larger diabetes data crisis. Yet, a shocking and abrupt revision in international estimates has revealed a parallel crisis: the country does not reliably know how many of its citizens are living with the condition, creating a dangerous blind spot in its healthcare strategy.
This alarming situation exposes a deep-seated diabetes data crisis, which threatens to make an already devastating "silent killer" entirely invisible for policymakers and the public.
The Alarming Fluctuation in Diabetes Figures
For years, the International Diabetes Federation (IDF) Diabetes Atlas has served as the primary source for national prevalence data. In its 2021 edition, the IDF estimated that 4.2 million adults in South Africa were living with diabetes. However, its newly published 11th edition for 2024 tells a drastically different story, revising this figure down to just 2.324 million adults, a prevalence of 7.2%.
This represents an astonishing 45% drop in the estimated number of people with diabetes. This is not the result of a miraculous public health triumph but a stark admission of a data failure. The dramatic change highlights the fragility of the surveillance systems used to generate these figures, which rely on modelling rather than comprehensive, real-time national data.
From Silent Killer to Invisible Epidemic
While a lower number might seem like cause for celebration, healthcare advocates warn that it fosters a dangerous sense of complacency. Diabetes continues to exact a heavy toll in clinics and communities across the country, but the fluctuating statistics risk masking the true scale of the epidemic. When official data fails to reflect the lived reality of overwhelmed healthcare workers and suffering patients, the result is systemic neglect.
This data discrepancy means millions of people - the "missing millions" - are not accounted for in national health planning. They remain uncounted, unseen, and unsupported, placing them at higher risk of devastating and preventable complications.
The Human Cost of the Diabetes Data Crisis
These are not mere abstract numbers. The millions who fall through these statistical cracks are real people. They are parents facing amputation due to unmanaged diabetic foot complications, children receiving a late diagnosis of type 1 diabetes, and workers forced into early retirement by diabetes-related kidney failure. Every person living with undiagnosed or poorly managed diabetes represents a family at risk of premature loss and a healthcare system fighting a tidal wave of cases without a clear map.
Without accurate data, budgets are misaligned, public health campaigns fail to meet their targets, and vital resources cannot be allocated where they are most needed.
An Urgent Call for a National Diabetes Registry
The solution, experts argue, is for South Africa to move beyond its reliance on international estimates and invest in its own robust data infrastructure. Establishing a national diabetes registry is paramount. Such a system would provide real, local, and reliable data, offering a clear picture of the epidemic.
A national registry would enable the disaggregation of data to understand not only how many people have diabetes, but also which communities are most affected, what services they can access, and what their long-term health outcomes are. Only by counting every person can the nation hope to support them effectively.
This is more than a technical problem; it is a matter of justice and national accountability. If South Africa cannot accurately count its citizens living with diabetes, it cannot possibly claim to be addressing this deadly epidemic with the seriousness it demands.
- Dr Patrick Ngassa Piotie is a Senior Programme Manager at the University of Pretoria Diabetes Research Centre and serves as the Chairperson of the Diabetes Alliance.