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The objective of the study was to assess associations between plasma p-tau217, p-tau181, cognition, and multimorbidity. We studied 236 MCI patients and 210 controls. Cognition was assessed using the Mini-Mental State Examination and Montreal Cognitive Assessment. Multimorbidity was defined as \u22652 chronic conditions, and comorbidity as coexisting diseases. MCI was associated with lower cognition, higher p-tau levels, and greater multimorbidity. Plasma p-tau217 correlated inversely with cognition. 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