Strokes Before 55 Nearly Doubled. Heart Attacks Went the Other Way

For three decades, stroke has been one of medicine's quiet success stories. Rates fell as blood pressure, cholesterol and smoking came under control. A study published in Neurology on September 23, 2026, shows that the success has an age limit. In one American region tracked since 1993, the rate of first strokes in adults aged 20 to 54 nearly doubled, while the rate in older adults fell. Two earlier studies from Oxford point the same way, and add the detail that makes the trend hard to explain: in the same young age group, heart attacks went down.

What Cincinnati counted

The Greater Cincinnati/Northern Kentucky Stroke Study covers a five county region on both sides of the Ohio River. Its method is slow and careful: in six study periods (July 1993 to June 1994, then the calendar years 1999, 2005, 2010, 2015 and 2020), the team pulls hospitalized stroke cases and has stroke trained physicians confirm each one. Rates are standardized to the 2010 US population, so an aging region does not distort the comparison.

Across all six periods, the researchers, led by Emily Fisher at the University of Cincinnati, found 2,076 first ever strokes in adults aged 20 to 54. The rate rose from 33.90 to 62.18 cases per 100,000 person years between 1993/94 and 2020. Over the same span, the rate in older adults fell from 618.78 to 453.04. Ischemic stroke, the kind caused by a blocked vessel, drove most of the rise: 23.8 to 47.3 per 100,000. Short term survival improved a little. Death within 30 days of a stroke in young adults dropped from 11.7% to 9.4%, mostly in bleeding strokes.

Young strokes nearly doubled. Strokes in older adults fell. Older adults still have about seven times the rate.

That last point matters for scale. Stroke remains overwhelmingly a disease of later life. What changed is the direction of travel: the curve that bends down after 55 bends up before it.

The risk factors moved too

Among young people who had a stroke, high blood pressure, diabetes, atrial fibrillation and substance use all became more common over time. The University of Cincinnati release puts substance use at 4.6% of young stroke patients in 1993/94 and 40.2% in 2020, much of it marijuana. The study cannot say whether those shifts explain the rise. It has no comparable data on people in the region who did not have a stroke, so a risk factor that became more common everywhere would look the same as one that became more dangerous. The authors list that gap as a limitation themselves.

Oxford asked the sharper question

A rise in young strokes could, in principle, be an artifact. Brain MRI finds small strokes that older scans missed, and coding habits in hospital records change. The Oxford Vascular Study was built to get around that. It follows every acute vascular event in a population of about 94,567 people registered with general practices in Oxfordshire, England, with each stroke or warning episode assessed in person whenever possible and every case reviewed by the same senior neurologist.

In a 2022 JAMA paper, Linxin Li, Catherine Scott and Peter Rothwell compared 2002 to 2010 with 2010 to 2018. Stroke incidence under 55 rose by 67% (incidence rate ratio 1.67). Over 55, it fell by 15%. Transient ischemic attacks, the brief warning episodes, rose under 55 as well. But heart attacks and other major vascular events in the same young age group went the other way, with a rate ratio of 0.73, a fall of about a quarter. More MRI use could not account for the difference, the authors report, because imaging rose by the same amount in older patients.

Two other findings make the young stroke picture stranger. The share of young patients with none of the classic risk factors the study tracked, such as smoking, high blood pressure, high cholesterol or diabetes, rose from 30.4% to 42.4%. And the increase was steepest in professional and managerial occupations, with a rate ratio of 2.52, against 1.17 in partially skilled or unskilled jobs. Among young heart attack patients, the share without risk factors fell. If the same arteries were simply clogging earlier, heart attacks should be climbing alongside strokes. They are not, and the authors conclude that the rise in young stroke is unlikely to be driven by atherosclerosis. They raise work stress, long hours, low physical activity and air pollution as possibilities that need more research, not as findings.

Not just two regions

Two populations could be a coincidence. The same Oxford group pooled the wider literature in JAMA Neurology the same year: 50 studies in 20 high income countries. Absolute trends in young stroke varied from place to place. But in all 26 studies with enough data to compare age groups across time, the trend was less favorable at younger ages than at older ages, with a pooled ratio of 1.57. The gap was largest, 1.87, in population studies whose latest period started after 2010. The gap was similar for men and women, and for ischemic stroke.

Put together, the three papers describe one pattern seen with different tools on two continents. The older population is getting the benefit of decades of prevention. The younger one is not, and whatever is pushing young strokes up does not seem to be pushing young heart attacks up with it.

The useful part of this story is the contrast, not the headline number. A doubling from a low base is real but modest in absolute terms. A stroke trend that splits away from the heart attack trend in the same people is the more important signal, because it says the usual explanation, worse arteries earlier, does not cover it. Until someone finds what does, age alone is a weaker reassurance than it used to be. The University of Cincinnati release closes with the standard FAST reminder of the warning signs, which do not change with age: facial drooping, arm or leg weakness, speech trouble, and time to call 911. This article is not medical advice; questions about personal risk belong with a doctor.