A new study found that strokes among adults ages 20 to 54 nearly doubled over nearly three decades in Greater Cincinnati and Northern Kentucky, with researchers noting that more younger adults may now be living with the long-term effects of stroke. The study appeared September 23, 2026, in Neurology.
2,076 first strokes in Greater Cincinnati and Northern Kentucky
Researchers at the University of Cincinnati examined cases from 1993 through 2020 and identified 2,076 adults ages 20 to 54 with a first stroke. The rate climbed from 33.9 to 62.2 cases per 100,000 person-years, an increase of about 83%. Person-years account for both population size and observation time.
Ischemic strokes, caused by a blocked blood vessel, drove the rise. Their rate went from 23.8 to 47.3 per 100,000 person-years. No comparable increases appeared in intracerebral hemorrhage or subarachnoid hemorrhage.
A summary of the study reports that adults 55 and older saw a decline, from 618.78 to 453.04 cases per 100,000 person-years. It also reports that more frequent MRI use, which rose from 32.7 percent to 79.2 percent, did not explain the divergence.
Hypertension, diabetes and a jump in documented substance use
Among young stroke patients, documented hypertension rose from 47.3 percent to 60.3 percent, diabetes from 19.1 percent to 25.5 percent, and atrial fibrillation from 1.4 percent to 5.9 percent. Documented substance use rose from 4.6 percent to 40.2 percent, with cannabis reaching 30.6 percent by 2020, according to the same summary.
The study cannot say these trends caused the increase. Researchers lacked comparable health data from people who never had a stroke, and the work covers one region, so it cannot show whether the pattern holds nationwide.
Outside clinicians offer partial explanations. Dr. Lee Schwamm told Newsweek it is quite likely that much of the increase is due to the growing prevalence of factors such as diabetes, obesity and hypertension among younger patients whether known or unrecognized, which is expressing itself as ischemic stroke at younger ages.
Lynda Lisabeth, an epidemiology professor at the University of Michigan, said studies of younger adults have documented increasing stroke incidence alongside increasing prevalence of these risk factors.
Dr. Michelle Leppert, a vascular neurologist at Tufts Medical Center in Boston, cautioned that risk factors can’t be the whole answer. If they were, she said, heart attacks would be rising among young adults too, and they aren’t. She also noted strokes occur more often in women under 45 than in men.
Death within 30 days fell from 11.7 to 9.4 percent
After adjusting for age, race and sex, 30-day deaths fell from 11.7 percent in 1993-94 to 9.4 percent in 2020. The gain was concentrated in bleeding strokes: intracerebral hemorrhage deaths fell from 27.5 percent to 21.2 percent and subarachnoid hemorrhage deaths from 27.9 percent to 18.6 percent. Ischemic stroke fatality held at 4.9 percent.
Study author Emily R. Fisher of the University of Cincinnati said more people surviving means more younger adults may be living with the long-term effects of stroke.
The researchers noted survivors can face lasting problems with movement, speech and memory.
What clinicians say young adults can do
Schwamm pointed to the American Heart Association’s Life’s Essential 8
and advised young people on getting regular checkups and ensuring you have a basic set of bloodwork screening for risk factors including cholesterol measurement by age 18 at the latest.
George Howard, a University of Alabama at Birmingham professor, said preventing hypertension, preventing diabetes, and never starting smoking, seems to be the best course,
while stressing that not a lot is known about risk factors for stroke in the young.
Speed matters when symptoms hit. Leppert pointed to the American Stroke Association’s BE FAST checklist: balance problems, eye changes, face drooping, arm weakness, speech difficulty, and time to call for emergency care. Dr. Swetha Renati of Tampa General Hospital said the acronym was expanded because children and women can present atypically.
Fisher put the research gap plainly: Additional research is needed to better understand what is driving these trends and how they can be reversed.