Study provides new data on Alzheimer’s disease prevalence based on blood biomarkers
A study published in Nature has, for the first time, provided real-life data for how common the changes associated with Alzheimer’s disease are by age.
Researchers from King’s College London, Stavanger University Hospital and the University of Gothenburg looked at data from 11,500 people drawn at random who’d been tested for p-tau217, a blood-based biomarker for Alzheimer’s disease.
They found that fewer than 8% of people in their 50s and 60s carried the p-tau217 marker but this rose to about two-thirds of people over 90. The findings suggest a higher prevalence of Alzheimer’s disease in older people than previously estimated.
You can read the study here: https://www.nature.com/articles/s41586-025-09841-y