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Adjusted probability of amyloid-positive normal cognition versus Alzheimer's disease (A), normal cognition versus mild cognitive impairment (B), and mild cognitive impairment versus Alzheimer's disease (C) with levels of soluble Aβ42 by SUVR tertiles of brain amyloid. SUVR: standardized uptake value ratio; NC: normal cognition; MCI: mild cognitive impairment; AD: Alzheimer's disease. The results are adjusted for age, sex, education, APOE4, p-tau levels, and t-tau levels.
