The annual rate of first-ever stroke among adults ages 20 to 54 in the Cincinnati area climbed from 33.9 to 62.2 per 100,000 person-years, an increase of about 83%, in a study that tracked the region from 1993 through 2020. The researchers counted 2,076 first strokes in that age band, and the rise came from the most common type, a blocked blood vessel in the brain.
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Survival after a stroke improved over the same period, with 30-day deaths falling modestly, which means more young people are living with the aftermath. Emily Fisher, a vascular neurology fellow at the University of Cincinnati who is lead author of the paper, said stroke is becoming increasingly common in younger adults, even though it has traditionally been considered a disease of older adults. Her team’s work gives that shift a number, drawn from nearly three decades of records.
Counting strokes across five counties
The work was published September 23, 2026, in Neurology, the American Academy of Neurology’s journal. The data come from the Greater Cincinnati/Northern Kentucky Stroke Study, which, according to the University of Cincinnati’s account, has tracked stroke in a five-county region since 1993. The registry-style design, which follows one defined region over time, is what lets the researchers express the change as a rate per 100,000 person-years rather than as a raw count of cases.
The 83% comes from comparing two windows: 1993 to 1994 at the start and 2020 at the end. The overall rate went from 33.9 to 62.2 per 100,000 person-years, as laid out in the ScienceDaily summary and the American Academy of Neurology’s release. Those figures describe a single region and cannot confirm the same trend nationwide. The study also compared only the early and late periods, which means it shows where the rate started and ended but cannot by itself describe the path between them year by year.
Ischemic stroke drove the increase
Ischemic stroke, in which a clot or other particle blocks a brain blood vessel, rose from 23.8 to 47.3 per 100,000 person-years, nearly doubling and accounting for most of the overall rise. The Centers for Disease Control and Prevention describes ischemic stroke as the most common type, the other major form being hemorrhagic stroke, in which a brain artery leaks or ruptures.
The hemorrhagic types did not follow the same pattern, and that contrast narrows the search for explanations. The researchers found no comparable increase for intracerebral hemorrhage or for subarachnoid hemorrhage, so the trend is specific to blockages rather than to strokes in general. The study does not say why, but one of the risk factors that became more common, atrial fibrillation, is an irregular heartbeat that can allow clots to form, which fits the blockage-type pattern.
Blood pressure, diabetes and substance use
Among young adults who had a stroke, high blood pressure, diabetes, atrial fibrillation and substance use all became more common over the study period. Atrial fibrillation is an irregular heartbeat that can allow clots to form and travel to the brain. These are the risk factors the authors tracked among patients across the decades, and each rose in prevalence between the early and late periods. The sharpest change was in substance use, documented in 4.6% of patients in 1993 to 1994 and 40.2% in 2020, with much of the increase tied to marijuana use.
The study design limits how much weight those figures can bear, and the authors are explicit about it. Without comparable data from people who did not have a stroke, the team could not determine whether the shifts in risk factors explain the rise in stroke rates; the numbers describe who had strokes, not who was most likely to have one. Fisher said the findings point to the importance of identifying and managing stroke risk factors early in adulthood, and that additional research is “needed to better understand what is driving these trends and how they can be reversed.”
Fewer deaths, more survivors
Thirty-day mortality, adjusted for age, race and sex, fell from 11.7% to 9.4%, with the improvement mostly among hemorrhagic stroke patients. The authors note that survival does not mean full recovery. Survivors can be left with lasting problems with movement, speech, memory or other abilities, and the authors point out that more younger adults may now be surviving strokes and living with long-term effects. A falling death rate and a rising incidence rate can therefore coexist, with the burden shifting from early deaths toward long-term disability.
The open question, in the authors’ own framing, is cause. Fisher’s closing call was for additional research into what is driving the trend and how it can be reversed, a request that the current data cannot answer on their own. A rate that nearly doubled in 27 years, alongside rising blood pressure, diabetes and substance use among patients, raises hypotheses, but this single-region record cannot settle which of them matter most.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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