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• W2912984735 startingPage "S41" @default.
• W2912984735 abstract "Background:Impaired physical function (i.e., slowing of gait, muscle weakness, and poor mobility) is common in older adults with cognitive impairment and dementia. Evidence suggests that cerebral small vessel disease, specifically white matter lesions (WMLs), is associated with impaired physical fu nction, but little research has been conducted to understand the specific role of Alzheimer’s disease pathology in physical outcomes. Objective:The objective of this study was to examine the association between cerebral amyloid-β (Aβ) deposition and physical function in people with cognitive impairment. Methods:Thirty participants completed an 11C Pittsburgh compound B (PIB) position emission tomography (PET) scan to quantify global Aβ deposition using standardized uptake value ratio (SUVR). We assessed usual gait speed, muscle strength of the lower extremities, balance, and functional mobility using the Short Physical Performance Battery (SPPB) and the Timed Up and Go Test (TUGT). Multiple linear regression analyses examined the association between Aβ and each measure of physical function, adjusting for age, body mass index, and WML load. Results:Global PIB SUVR was significantly associated with usual gait speed (β= –0.52, p = 0.01) and SPPB performance (β= –0.47, p = 0.02), such that increased Aβ deposition was associated with reduced performance on both measures. Global PIB SUVR was not significantly associated with TUGT performance (β= 0.32, p = 0.08). Conclusions:Cerebral Aβ deposition is associated with reduced gait speed, muscle strength, and balance in older adults with cognitive impairment independent of WML load. However, Aβ deposition was not associated with functional mobility." @default.
• W2912984735 created "2019-02-21" @default.
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• W2912984735 date "2019-09-19" @default.
• W2912984735 modified "2023-10-10" @default.
• W2912984735 title "Cerebral Amyloid-β Deposition Is Associated with Impaired Gait Speed and Lower Extremity Function" @default.
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• W2912984735 doi "https://doi.org/10.3233/jad-180848" @default.
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• W2912984735 hasPublicationYear "2019" @default.
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