Stroke risk factors for Black African and Caribbean populations are rising faster than for white people, according to a new study from King’s College London. The research, published from the South London Stroke Register, tracked over 8,500 adults for 30 years and reveals alarming trends in hypertension and diabetes prevalence among ethnic minority groups.
How Stroke Risk Factors Differ by Ethnicity
The study found that diabetes was about twice as common in Black Caribbean and Black African stroke patients compared with white participants. High blood pressure was 29% more prevalent in Black Caribbean individuals and 47% more prevalent in Black African individuals. These stroke risk factors are not only more common but also increasing more rapidly.
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Rising Diabetes Rates Over Three Decades
Diabetes rates climbed for all ethnic groups between 1995 and 2024, but the increase was steepest among Black African participants. The prevalence rose from 21% in the first decade to 41% in the last decade — a near doubling. For Black Caribbean participants, the rate increased from 25% to 34%, while white participants saw a smaller rise from 14% to 22%.
| Ethnic Group | Diabetes Prevalence (1995–2004) | Diabetes Prevalence (2015–2024) |
|---|---|---|
| Black African | 21% | 41% |
| Black Caribbean | 25% | 34% |
| White | 14% | 22% |
Younger Strokes and Missed Warning Signs
Black people were also twice as likely to experience a stroke without a prior diagnosis of any risk factor — 12% compared with 6% for white individuals. This suggests that stroke prevention programs may be failing to catch at-risk individuals early enough. Dr. Eva Emmett, lead author, noted that NHS health checks begin at age 40, but this may be “too late for higher-risk groups who often experience stroke at a younger age.”
What This Means for Prevention
The findings call for targeted, earlier screening and lifestyle interventions. High blood pressure and diabetes are modifiable risk factors, but they must be detected and managed before a stroke occurs. Community-based education and culturally tailored health campaigns could help close the gap.
- Diabetes rates in Black African stroke patients doubled over 30 years
- High blood pressure is up to 47% more prevalent in Black African individuals
- One in six UK adults will have a stroke in their lifetime
- Black people are more likely to have a stroke without prior risk factor diagnosis
- Earlier screening (before age 40) is recommended for high-risk groups
FAQ
Why are stroke risk factors rising faster for Black people?
The study points to higher rates of diabetes and hypertension in Black African and Caribbean populations, combined with later detection and socioeconomic disparities. Genetic, dietary, and healthcare access factors may also play a role.
What age should Black people start stroke screening?
Researchers suggest that NHS health checks, which start at 40, may be too late. Those with family history or other risk factors should consider earlier checks, possibly in their 30s, and maintain regular blood pressure and glucose monitoring.
Can lifestyle changes reduce stroke risk for Black communities?
Yes. Managing high blood pressure through diet, exercise, and medication, along with controlling diabetes, can significantly lower stroke risk. Culturally specific support and early intervention are key.
Take Action to Protect Your Health
Understanding your stroke risk factors is the first step. If you are of Black African or Caribbean heritage, talk to your doctor about early screening for hypertension and diabetes. Small changes today can prevent a life-changing stroke tomorrow.