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• W2142904655 abstract "To determine whether neuroimaging biomarkers of amyloid-β (Aβ) and neurodegeneration (ND) are associated with greater self-reported subjective cognitive concerns (SCC) in clinically normal older individuals.A total of 257 participants underwent Pittsburgh compound B PET, PET with fluorodeoxyglucose (18)F, and structural MRI, as well as a battery of neuropsychological measures including several questionnaires regarding SCC. Individuals were classified into 4 biomarker groups: biomarker negative (Aβ-/ND-), amyloidosis alone (Aβ+/ND-), amyloidosis plus ND (Aβ+/ND+), and ND alone (Aβ-/ND+).Both Aβ and ND were independently associated with greater SCC controlling for objective memory performance. By contrast, neither Aβ nor ND was associated with objective memory performance controlling for SCC. Further examination revealed greater SCC in individuals with Aβ or ND positivity compared to biomarker-negative individuals. In addition, greater SCC predicted Aβ positivity when controlling for ND status.When individuals were grouped by biomarker status, those who were positive on Aβ or ND had the highest report of SCC compared to biomarker-negative individuals. Findings were consistent when SCC was used to predict Aβ positivity. Taken together, results suggest that both Aβ and ND are associated with SCC, independent of objective memory performance. Enrichment of individuals with SCC may increase likelihood of Aβ and ND markers in potential participants for secondary prevention trials." @default.
• W2142904655 created "2016-06-24" @default.
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• W2142904655 date "2015-06-05" @default.
• W2142904655 modified "2023-10-10" @default.
• W2142904655 title "Subjective cognitive concerns, amyloid-β, and neurodegeneration in clinically normal elderly" @default.
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• W2142904655 doi "https://doi.org/10.1212/wnl.0000000000001712" @default.
• W2142904655 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4501939" @default.
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• W2142904655 hasPublicationYear "2015" @default.
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