ArticleAlzheimer's & dementia : the journal of the Alzheimer's Association2026
Prognostic value of plasma %p-tau217 in cognitively unimpaired older adults.
Article in Alzheimer's & dementia : the journal of the Alzheimer's Association, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
introductionWe evaluated the prognostic value of baseline plasma phosphorylated tau 217 ratio (%p-tau217) for predicting long-term progression in cognitively unimpaired (CU) older adults.
methodsWe analyzed 982 community-dwelling individuals followed annually for up to 12 years. Baseline %p-tau217 levels were quantified by mass spectrometry and stratified into four strata using previously defined cut-offs. Outcomes included longitudinal changes in cognition, neurodegeneration, and progression to mild cognitive impairment (MCI)/dementia. Results were replicated with immunoassays in the same and an independent primary care cohort (n = 1204).
resultsParticipants with Elevated/High %p-tau217 exhibited accelerated cognitive decline, hippocampal atrophy, and significantly higher risks of progression to MCI (hazard ratio [HR] > 6.0) and dementia (HR > 9.9). The Low group demonstrated a 92.2% 10-year negative predictive value for any progression. DISCUSSION: Our results suggest that %p-tau217 is a robust prognostic biomarker, accurately distinguishing CU individuals at minimal risk from those at high risk of future AD-related clinical and neurodegenerative decline. Similar performance was achieved by immunoassays.
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