Prevention works when it reaches the people who need it
For thirty years, a register tracking every stroke in South London has quietly recorded an inequality that numbers now make impossible to ignore: black men and women in England suffer strokes at twice the rate of their white neighbors, and when those strokes arrive, they arrive a decade earlier and are met with less care. Researchers at King's College London, presenting at the European Stroke Organisation conference, trace this disparity to a convergence of undertreated hypertension, pandemic-era care disruptions, and the slower, structural violence of systemic racism and poverty. The data does not merely describe a health gap — it describes a society that has not yet decided to close it.
- Stroke cases in South London rose 13% between 2020 and 2024, reversing fifteen years of steady decline and exposing a racial gap that had never disappeared.
- Black African and Caribbean residents are experiencing strokes at rates 131% and 100% higher than white residents respectively — not because of biology alone, but because hypertension and diabetes go uncontrolled at far higher rates in their communities.
- Black stroke survivors are 34% less likely to receive NHS follow-up care, the critical window that prevents a second, often deadlier stroke — a gap researchers link to unconscious bias, systemic racism, and a rational mistrust born from documented discrimination.
- The pandemic fractured primary care access most severely for black and economically deprived communities, accelerating a crisis that was already decades in the making.
- Advocates are calling on the government to treat stroke prevention as an equity issue, arguing that national stroke rates have fallen before — proof the tools exist — but only reach those who most need them when structural barriers are actively dismantled.
A thirty-year study drawing on one of the world's most rigorous population-based stroke registers has confirmed what many in black communities have long experienced: in England, being black roughly doubles your risk of stroke, and when a stroke occurs, the care that follows is measurably less likely to arrive.
Researchers at King's College London mined data from the South London Stroke Register, which tracks every stroke across a defined population of 333,000 people — not a curated clinical sample, but an entire community. Their findings, presented at the European Stroke Organisation conference, document 7,726 strokes over the study period. After years of declining incidence, stroke cases rose 13% between 2020 and 2024. Within that surge, black African residents experienced strokes at rates 131% higher than white residents; black Caribbean residents, 100% higher.
Two forces drive the disparity. Black communities carry disproportionately high rates of hypertension and diabetes — conditions that are both more prevalent and more often uncontrolled, even after accounting for socioeconomic differences. High blood pressure alone is responsible for roughly half of all strokes. Then, when strokes do occur, the recovery pathway is compromised: black survivors are 34% less likely to receive NHS follow-up care, and they typically suffer their first stroke ten to twelve years earlier than white counterparts, narrowing the window for intervention.
Lead researcher Dr. Camila Pantoja-Ruiz identified a layered crisis: pandemic disruptions to primary care fell hardest on black and deprived communities, but beneath that acute rupture lie older, slower injuries — racism, unconscious bias in clinical settings, poverty, and a mistrust of healthcare institutions that is not irrational but historically earned.
The Stroke Association's director of policy, Maeva May, offered a pointed observation: stroke rates have fallen nationally over two decades, demonstrating that prevention works. The question is not whether the tools exist, but whether the will exists to direct them toward the communities carrying the heaviest burden. Without deliberate government intervention, she warned, black people in England will continue to experience strokes earlier, more often, and with less access to the care that might prevent the next one.
A three-decade examination of stroke patterns in South London has surfaced a stark disparity: people of black African and Caribbean descent in England face roughly double the stroke risk of their white neighbors, and when strokes do strike, they are significantly less likely to receive prompt follow-up care. The finding comes from researchers at King's College London, who presented their analysis at the European Stroke Organisation conference after mining three decades of data from the South London Stroke Register—one of the world's most comprehensive population-based stroke tracking systems. Unlike clinical trials that recruit selected participants, this register captures every single stroke case within a defined population of 333,000 people, lending it unusual authority.
The numbers tell a sobering story. Between 1995 and 1999, stroke incidence in the region fell steadily, declining by 34% over the next fifteen years. But the trend reversed. From 2020 to 2024, stroke cases climbed 13 percent. During that recent uptick, the disparity became unmistakable: black African populations experienced strokes at rates 131 percent higher than white residents, while black Caribbean populations faced rates 100 percent higher. The register documented 7,726 strokes across the population during the study period.
Underlying these numbers are two interconnected problems. First, people of black descent carry disproportionately high rates of the conditions that trigger strokes. They are up to 47 percent more likely to have high blood pressure and twice as likely to have diabetes, even when researchers account for socioeconomic factors. High blood pressure alone drives roughly half of all strokes, and in black communities it often goes uncontrolled. Second, when strokes occur, the pathway to recovery is compromised. Black African stroke survivors were 34 percent less likely to receive follow-up care through the NHS—the critical window when doctors work to prevent recurrence. These same survivors typically experienced their first stroke between 10 and 12 years earlier than white counterparts, compressing their window for intervention.
Dr. Camila Pantoja-Ruiz, the study's lead author, pointed to multiple forces converging to create this crisis. The Covid-19 pandemic disrupted primary care access, blood pressure monitoring, and medication prescribing—disruptions that fell hardest on black and economically deprived communities. But the roots run deeper. Racism, unconscious bias in healthcare settings, and the material circumstances of poverty all shape who gets screened, who gets treated, and who receives follow-up. The mistrust some black patients harbor toward healthcare systems, Pantoja-Ruiz noted, stems from documented historical and ongoing discrimination. That mistrust, rational as it may be, leaves patients vulnerable when they most need intervention.
Maeva May, director of policy at the Stroke Association, framed the challenge as one of equity in prevention. Stroke rates have fallen nationally over two decades, she observed—proof that prevention works. But prevention only works if it reaches the people who need it most. The current crisis, she argued, reflects not just medical factors but the broader social architecture: poor housing, economic precarity, and limited access to healthcare all shape health long before a stroke occurs. She called on the government to make stroke prevention a priority and to listen to the communities bearing the heaviest burden. Without urgent intervention, the trajectory is clear: black communities in England will continue to experience strokes earlier, more frequently, and with less access to the care that prevents the next one.
Notable Quotes
These patterns of increased stroke risk may be influenced by broader factors, including racism, unconscious bias and socioeconomic circumstances, which can impact access to and quality of care.— Dr. Camila Pantoja-Ruiz, King's College London
The challenge now is making sure that this support reaches everyone equally. The government must prioritise stroke and be guided by the voices of communities who are adversely affected.— Maeva May, Stroke Association
The Hearth Conversation Another angle on the story
Why did stroke rates start climbing again in 2020 after decades of decline?
The pandemic fractured the systems that had been working. People couldn't access their GPs for blood pressure checks, couldn't get prescriptions refilled reliably. But it wasn't random—the disruption hit hardest in communities already struggling with access.
So the disparity isn't new. It's been there the whole time?
The disparity is older than the register itself. What's new is how visible it became, and how it worsened when the system broke down. The study shows black communities were already carrying higher stroke risk. The pandemic just exposed how fragile their safety net was.
The study mentions mistrust of healthcare. Is that a cause or a symptom?
Both. It's a symptom of real discrimination—historical and ongoing. But it also becomes a cause when patients avoid care because they don't trust the system. You end up with uncontrolled blood pressure, undiagnosed diabetes, and then a stroke at 50 instead of 65.
If high blood pressure causes half of all strokes, why isn't screening universal?
It is, officially. But screening only matters if people can access it, afford medication, and trust the person telling them they're at risk. When you're working two jobs and your GP practice has a three-week wait, screening becomes theoretical.
What does 34 percent less likely to receive follow-up care actually mean in practice?
It means fewer clinic appointments, less medication adjustment, less monitoring for warning signs. After a stroke, the weeks and months matter enormously. You're trying to prevent the next one. If you're not being seen, you're essentially waiting for it to happen again.
Can this be fixed?
The researchers say yes—stroke prevention works when it reaches people. But it requires treating this as a priority, not a footnote. It means more resources in communities that have been underserved, listening to what people actually need, and dismantling the barriers that keep them from care.