30-Year Study: Stroke Rates Rising Again, With Deep Disparities in Black Communities

A new 30-year population analysis presented at the European Stroke Organisation Conference (ESOC) 2026 reveals that stroke incidence in South London—after falling substantially through the early 2010s—has rebounded sharply, with the burden falling disproportionately on Black African and Black Caribbean communities and those in the lowest socioeconomic strata. For clinicians managing cardiovascular risk in diverse urban populations, the findings underscore both persistent gaps in primary prevention and troubling inequities in post-stroke follow-up care.

"These inequalities persisted even after adjusting for clinical severity, socioeconomic status, and other clinical factors," said lead researcher Dr. Camila Pantoja-Ruiz of King's College London, whose team conducted the analysis.¹

The observational study tracked stroke incidence across a population of approximately 333,000 individuals in South London over 30 years, capturing 7726 incident strokes. Researchers stratified outcomes by self-reported ethnicity and socioeconomic deprivation quintile across five calendar periods from 1995–1999 through 2020–2024.¹

After an encouraging 34% decline in stroke incidence between 1995–1999 and 2010–2014—falling from 198 to 131 cases per 100,000 persons—the overall rate reversed course, rising 13% in the 2020–2024 period.¹ The rebound was not evenly distributed. In the most recent period, stroke incidence was more than twice as high in Black African populations (Incidence Rate Ratio [IRR] 2.31; 95% CI, 2.03–2.62) and Black Caribbean populations (IRR 2.00; 95% CI, 1.73–2.31) compared with White populations.¹

Disparities were most pronounced for intracerebral hemorrhage, a particularly severe and often fatal stroke subtype, where differences between Black African, Black Caribbean, and White populations exceeded those observed for ischemic subtypes.¹

Clinical Context

Stroke remains one of the leading causes of mortality and long-term disability globally, and cardiovascular risk factor burden—particularly hypertension and diabetes—is well established as a primary driver of incidence and subtype distribution.²

Compared with White participants in the South London cohort, Black African individuals had a 47% higher prevalence of hypertension and a 92% higher prevalence of diabetes; Black Caribbean individuals had a 29% higher hypertension prevalence and a 123% higher diabetes prevalence.¹ These differentials align with patterns documented in prior epidemiological literature on cardiometabolic risk stratification across ethnic groups.²

Critically, 12% of Black African patients had no previously diagnosed risk factors at the time of stroke, compared with 6.3% of White patients, suggesting meaningful gaps in earlier-stage detection and primary care engagement.¹

Interpretive Framing

Beyond incidence rates, the study identified a 10–12 year earlier age of stroke onset in Black African populations relative to White populations—a finding with direct implications for the timing of cardiovascular risk screening in clinical practice.¹ Black African stroke survivors were also found to have 34% lower odds of receiving timely follow-up care after acute events, pointing to system-level failures that may compound already elevated biological risk.¹

These inequities likely reflect a confluence of structural factors including differential access to preventive care, lower uptake of cardiovascular risk management programes, and potential implicit biases in post-acute care pathways. The authors' observation that disparities persisted after adjustment for socioeconomic status suggests ethnicity-associated risk operates through mechanisms not fully captured by deprivation indices alone.¹

Limitations and Next Steps

As an observational, single-region study conducted in one diverse urban area of South London, the generalizability of these findings to other geographic contexts requires caution. Residual confounding cannot be excluded. The authors note that findings "reflect broader patterns seen in diverse urban populations internationally," but cross-population validation through prospective multicentre studies would strengthen the evidence base.¹ The contribution of pandemic-era disruptions to the 2020–2024 incidence rise warrants further investigation.

References

1. Pantoja-Ruiz C, et al. Rising stroke rates highlight widening ethnic and socioeconomic inequalities across populations. Presented at: European Stroke Organisation Conference (ESOC) 2026; May 5, 2026. Available at: https://www.prnewswire.com/news-releases/esoc-2026-rising-stroke-rates-highlight-widening-ethnic-and-socioeconomic-inequalities-across-populations-major-study-finds-302759136.html
2. Feigin VL, Brainin M, Norrving B, et al. World Stroke Organization (WSO): Global stroke fact sheet 2022. Int J Stroke. 2022;17(1):18-29. doi:10.1177/17474930211065917