Stroke Incidence Nearly Doubles Among Young Adults, Study Finds

Stroke incidence among adults aged 20 to 54 has nearly doubled over a three-decade period, according to a study analyzing data from the Greater Cincinnati/Northern Kentucky region. The incidence increased from approximately 34 strokes per 100,000 people annually in 1993-1994 to about 62 strokes per 100,000 people by 2020.

This concerning trend is primarily driven by ischemic strokes, which occur when a blood vessel supplying the brain becomes blocked. The study, published in the journal Neurology, also observed an increase in associated risk factors among younger adults experiencing strokes, including hypertension, diabetes, atrial fibrillation (irregular heartbeat), and substance use.

"This has major implications, since young people who develop disability from a stroke may no longer be able to work or provide for their families," said study co-author David J. Robinson, M.D., an assistant professor of clinical neurology and rehabilitation medicine at the University of Cincinnati College of Medicine.

The rise in documented substance use, predominantly marijuana, saw a sharp increase from 4.6% to 40.2% during the study period. While a relationship between marijuana use and stroke exists, researchers noted that most evidence points to heavier use. Further study is needed to understand the specific impact of marijuana on cardiovascular health and to properly advise patients.

In contrast to the trend in younger adults, stroke rates declined among older adults, falling from about 619 to 453 strokes per 100,000 people annually during the same period. Short-term survival after a stroke also improved for younger adults, with the 30-day mortality rate decreasing from 11.7% to 9.4%, largely due to better outcomes for bleeding-related strokes.

"Our study might provide evidence that we have gotten better at treating people who have hemorrhagic strokes and helping them survive, which is encouraging," Robinson stated. "Still, prevention is the most important thing to focus on, because just surviving a stroke doesn’t mean you aren’t left without disability."

Experts emphasize the importance of awareness, as stroke risk factors that affect older populations can also impact younger individuals. "Vascular disease doesn’t suddenly begin when you’re 65; it develops over time," noted Dr. Jason A. Gluck, vice chair of the Heart & Vascular Institute at AtlantiCare, who was not involved in the research. He added that conditions like high blood pressure, diabetes, smoking, obesity, abnormal cholesterol, and inactivity can all contribute to stroke risk at any age.

Limitations of the study include the inability to directly compare risk factors in individuals with and without strokes in the region, making it challenging to pinpoint exact causes for the rising incidence. Changes in medical documentation and diagnostic methods over the nearly three decades, such as increased MRI use which could improve detection, may also have influenced the findings. The study's geographical limitation to five counties in one state also means the results may not be universally representative.

Robinson recommended focusing on preventive measures, such as adopting the American Heart Association’s “Life’s Essential 8” checklist, which includes blood pressure control, healthy eating, regular activity, avoiding tobacco, adequate sleep, weight management, and controlling cholesterol and blood sugar.

Gluck advised the public to be aware of stroke symptoms using the “BE FAST” acronym: Balance suddenly off, Eyes or vision change, Facial drooping, Arm weakness, Speech difficulty, and Time to call 911. He urged anyone experiencing these symptoms or witnessing them in a loved one to call emergency services immediately rather than attempting to drive to the hospital.