Strokes have nearly doubled among younger adults, and scientists aren't sure why — SkimNews
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- Stroke rates among adults ages 20 to 54 rose from 33.9 to 62.2 cases per 100,000 person-years between 1993 and 2020 — an approximately 83% increase — according to a study of 2,076 first-stroke cases in Greater Cincinnati and Northern Kentucky.
- Ischemic strokes, caused by blocked blood vessels supplying the brain, drove most of the increase, climbing from 23.8 to 47.3 per 100,000 person-years, while intracerebral and subarachnoid hemorrhage rates showed no comparable rise.
- Documented substance use among younger stroke patients jumped from 4.6% in 1993-1994 to 40.2% in 2020, with much of the increase associated with marijuana use; high blood pressure, diabetes, and atrial fibrillation also grew more common.
- Thirty-day stroke mortality declined from 11.7% to 9.4% over the study period, with the steepest survival gains seen in the more dangerous bleeding-stroke subtypes.
- Study author Emily R. Fisher, MD, of the University of Cincinnati, said the findings underscore the need to identify and manage stroke risk factors early in adulthood, though the analysis could not establish causation because it lacked health data on a comparison group without strokes.
- The geographic limitation is significant: the data came from a single region, and researchers emphasized it is unknown whether the same trends apply nationwide.
Why it matters: An 83% rise in stroke incidence among adults 20-54 means a growing population of younger Americans — many still in their working years — faces decades of potential disability from movement, speech, and memory impairments, even as acute survival improves. Because the study lacked a stroke-free comparison group, it cannot pinpoint whether hypertension, diabetes, or the sharp rise in documented substance use are actually driving the trend, leaving clinicians without a clear prevention target.
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