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Research finds a significant increase in stroke incidence in those younger than 55 years

New research - funded by the Medical Research Foundation - has shown a sharp increase in the incidence of stroke in young adults, in a study of more than 94,000 people in Oxfordshire.

Stroke is a major health problem that can have devastating consequences. It happens when the blood supply to the brain is cut off, causing the death of brain cells and dysfunction in one or more parts of the brain. The restricted blood supply can be the result of an artery supplying blood to brain becoming blocked, a blood vessel rupturing causing a bleed inside the brain, or a brief reduction in the blood supply to the brain.

Findings from this new study, which analyzed the rate of new stroke cases in Oxfordshire over the last 20 years, reflect emerging evidence that young stroke is a growing problem in high-income countries.

The traditional view is that vascular risk factors, such as high blood pressure, diabetes and obesity, play a minor role in young stroke, but recent studies have begun to contradict this view.

Thanks to a research fellowship from the Foundation, Dr Linxin Li from the University of Oxford is investigating the role of these treatable risk factors in young stroke.

Dr Li's research focuses on multiple types of stroke, such as ischemic strokes, caused by a blockage of arteries, 'mini-strokes' (transient ischemic attacks) and bleeding in the brain (intracerebral hemorrhage and subarachnoid hemorrhage).

This new study, led by researchers from the Nuffield Department of Clinical Neuroscience at the University of Oxford, is published in a recent issue of the journal JAMA.

The researchers explored whether stroke incidence in younger and older people changed from 2002 to 2018, drawing on data from The Oxford Vascular Study, which comprises 94,567 people registered with GP practices across Oxfordshire.

Incidence refers to the number of people who develop a specific disease or health-related event – in this case stroke - during a particular time period.

The researchers also took into account other factors, such as lifestyle, changes in diagnostic practices, control of traditional vascular risk factors, and sex-specific causes of stroke.

They found that between 2002-2010 and 2010-2018, there was a 67 per cent increase in stroke incidence among younger adults (under 55 years), and a 15 per cent decrease among older adults (55 years or older). A similar divergence in incidence was not found for other vascular events, such as heart attacks.

Source: News Medical



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