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Suboptimal Self-reported Sleep Efficiency and Duration Are Associated with Faster Accumulation of Brain Amyloid Beta in Cognitively Unimpaired Older Adults

Abstract

Introduction: This study investigated whether self-reported sleep quality is associated with brain amyloid beta (Aβ) accumulation.

Methods: Linear mixed effect model analyses were conducted for 189 cognitively unimpaired (CU) older adults (mean ± standard deviation 74.0 ± 6.2; 53.2% female), with baseline self-reported sleep data, and positron emission tomography-determined brain Aβ measured over a minimum of three time points (range 33.3-72.7 months). Analyses included random slopes and intercepts, interaction for apolipoprotein E () ε4 allele status, and time, adjusting for sex and baseline age.

Results: Sleep duration <6 hours, in ε4 carriers, and sleep efficiency <65%, in the whole sample and ε4 non-carriers, is associated with faster accumulation of brain Aβ.

Discussion: These findings suggest a role for self-reported suboptimal sleep efficiency and duration in the accumulation of Alzheimer's disease (AD) neuropathology in CU individuals. Additionally, poor sleep efficiency represents a potential route via which individuals at lower genetic risk may progress to preclinical AD.

Highlights: In cognitively unimpaired older adults self-report sleep is associated with brain amyloid beta (Aβ) accumulation.Across sleep characteristics, this relationship differs by apolipoprotein E () genotype.Sleep duration <6 hours is associated with faster brain Aβ accumulation in ε4 carriers.Sleep efficiency < 65% is associated with faster brain Aβ accumulation in ε4 non-carriers.Personalized sleep interventions should be studied for potential to slow Aβ accumulation.

Citing Articles

Suboptimal self-reported sleep efficiency and duration are associated with faster accumulation of brain amyloid beta in cognitively unimpaired older adults.

Pivac L, Brown B, Sewell K, Doecke J, Villemagne V, Dore V Alzheimers Dement (Amst). 2024; 16(2):e12579.

PMID: 38651160 PMC: 11033837. DOI: 10.1002/dad2.12579.

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