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• W2117773291 abstract "Apathy is the most frequently reported neuropsychiatric symptom across all stages of Alzheimer's disease (AD). Both apathy and sleep disorders are known to have independent negative effects on the quality of life in individuals with AD. The aim of this study was to assess the relationship between apathy and sleep/wake patterns in individuals with AD using ambulatory actigraphy. One hundred and three non-institutionalized individuals with AD wore a wrist actigraph continuously over seven consecutive 24-h periods. Apathy was assessed using the Neuropsychiatric Inventory. Daytime mean motor activity (dMMA) was calculated from daytime wrist actigraphy data. Actigraphic parameters of sleep included total sleep time (TST), wake after sleep onset (WASO), time in bed (TIB), WASO normalized by TIB, sleep latency, and nighttime mean motor activity (nMMA). Among the 103 individuals with AD (aged 76.9 ± 7.2 years; MMSE = 21.4 ± 4.3), those with apathy had significantly lower dMMA, higher WASO (both raw and normalized), and spent more time in bed during the night than those without apathy. Sleep latency, nMMA and TST did not differ significantly between the two subgroups. To our knowledge, this study is the first to identify a relationship between apathy and sleep disturbance in those with mild or moderate AD: apathy was associated with increased TIB during the night and more WASO. These results suggest that AD patients with apathy have less consolidated nocturnal sleep than those without apathy." @default.
• W2117773291 created "2016-06-24" @default.
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• W2117773291 date "2011-06-14" @default.
• W2117773291 modified "2023-09-26" @default.
• W2117773291 title "Relationship between Apathy and Sleep Disturbance in Mild and Moderate Alzheimer's Disease: An Actigraphic Study" @default.
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• W2117773291 doi "https://doi.org/10.3233/jad-2011-101701" @default.
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