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Stroke risk is primarily linked to differences in traditional stroke risk factors, like diabetes and high blood pressure, rather than ethnicity, according to findings from a new south London study conducted at King's College London.

The research found that while Asian and Black individuals were more likely to have diabetes or hypertension than white individuals, the likelihood of someone having a stroke once they had these conditions was similar across ethnic groups.

Although previous research has consistently shown higher rates of stroke in some ethnic groups and has identified hypertension and diabetes as important contributors to these inequalities, the role of ethnicity in the risk of stroke has remained controversial.

The King's College London study set out to examine this relationship in more detail by looking separately at the development of cardiometabolic risk factors and the subsequent progression from these conditions to stroke.

Published in BMC Public Health, the study analyzed primary care electronic records from more than 650,000 people in south London, collected from 41 general practices in Lambeth between 2005 and 2021. The study included patients of Asian, Black and white ethnicity and examined three major risk factors for stroke: hypertension (high blood pressure), diabetes and hypercholesterolemia (high levels of cholesterol in the blood).

To study the relationship between ethnicity, the cardiometabolic risk factors and stroke, the researchers used a modeling technique called a 'multistate analysis.'

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