A blood test for p-tau217 may predict Alzheimer’s cognitive decline years before symptoms
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In a large international study led by Mass General Brigham Neuroscience Institute, older adults with very high blood levels of phosphorylated tau 217 had a 38% chance of cognitive impairment within five years and an estimated 78% within ten years, though the decade figure rests on substantially less data. Results were presented at the Alzheimer’s Association International Conference and published in JAMA.
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