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Open Access 01-12-2022 | Alzheimer's Disease | Research

Self-reported sleep characteristics associated with dementia among rural-dwelling Chinese older adults: a population-based study

Authors: Rui Liu, Shi Tang, Yongxiang Wang, Yi Dong, Tingting Hou, Yifei Ren, Lin Cong, Keke Liu, Yu Qin, Shireen Sindi, Yifeng Du, Chengxuan Qiu

Published in: BMC Neurology | Issue 1/2022

Abstract

Background

Sleep characteristics associated with dementia are poorly defined and whether their associations vary by demographics and APOE genotype among older adults are unclear.

Methods

This population-based cross-sectional study included 4742 participants (age ≥ 65 years, 57.1% women) living in rural China. Sleep parameters were measured using the self-rated questionnaires of the Pittsburgh Sleep Quality Index and Epworth Sleepiness Scale. Global cognitive function was assessed with the Mini-Mental State Examination (MMSE). Dementia was diagnosed following the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, criteria, and the National Institute on Aging-Alzheimer’s Association criteria for Alzheimer’s disease (AD). Data were analysed using multiple logistic and general linear regression models.

Results

Dementia was diagnosed in 173 participants (115 with AD). Multivariable-adjusted odds ratio (OR) of dementia was 1.71 (95%CI, 1.07-2.72) for sleep duration ≤4 h/night (vs. > 6-8 h/night), 0.76 (0.49-1.18) for > 4-6 h/night, 1.63 (1.05-2.55) for > 8 h/night, 1.11 (1.03-1.20) for lower sleep efficiency (per 10% decrease), and 1.85 (1.19-2.89) for excessive daytime sleepiness. Very short sleep duration (≤4 h/night), lower sleep efficiency, and excessive daytime sleepiness were significantly associated with being diagnosed with AD (multivariable-adjusted OR range = 1.12-2.07; p < 0.05). The associations of sleep problems with dementia and AD were evident mainly among young-old adults (65-74 years) or APOE ε4 carriers. Among dementia-free participants, these sleep characteristics were significantly associated with a lower MMSE score.

Conclusions

Self-reported sleep problems in dementia are characterized by very short or long sleep duration, low sleep efficiency, and excessive daytime sleepiness, especially among young-old people and APOE ε4 carriers.

Trial registration

ChiCTR1800017758 (Aug 13, 2018).

Available only for authorised users

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Title: Self-reported sleep characteristics associated with dementia among rural-dwelling Chinese older adults: a population-based study
Authors: Rui Liu
Shi Tang
Yongxiang Wang
Yi Dong
Tingting Hou
Yifei Ren
Lin Cong
Keke Liu
Yu Qin
Shireen Sindi
Yifeng Du
Chengxuan Qiu
Publication date: 01-12-2022
Publisher: BioMed Central
Keywords: Alzheimer's Disease
Dementia
Alzheimer's Disease
Dementia
Published in: BMC Neurology / Issue 1/2022
Electronic ISSN: 1471-2377
DOI: https://doi.org/10.1186/s12883-021-02521-0

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Self-reported sleep characteristics associated with dementia among rural-dwelling Chinese older adults: a population-based study

Abstract

Background

Methods

Results

Conclusions

Trial registration

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

Trial registration

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