Night Sleep Duration and Risk of Cognitive Impairment in a Chinese Population: A Cross-sectional Study.

Qiao Feng Song; Xiao Xue Liu; Wan Ning HU; Xiao Chen Han; Wen Hua Zhou; Ai Dong LU; Xi Zhu Wang; Shou Ling WU

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Night Sleep Duration and Risk of Cognitive Impairment in a Chinese Population: A Cross-sectional Study.

Author: Qiao Feng SONG ¹ ; Xiao Xue LIU ¹ ; Wan Ning HU ² ; Xiao Chen HAN ³ ; Wen Hua ZHOU ¹ ; Ai Dong LU ⁴ ; Xi Zhu WANG ¹ ; Shou Ling WU ⁵
Author Information

1. Department of Cardiology, Tangshan People's Hospital, North China University of Science and Technology, Tangshan 063000, Hebei, China.
2. The Cancer Institute, Tangshan People's Hospital, Tangshan 063000, Hebei, China
3. Department of Head and Neck Surgery, Tangshan People's Hospital, Tangshan 063000, Hebei, China.
4. Department of Ophthalmology, Kailuan Hospital, North China University of Science and Technology, Tangshan 063000, Hebei, China.
5. Department of Cardiology, Kailuan Hospital, North China University of Science and Technology, Tangshan 063000, Hebei, China.
Publication Type:Journal Article
Keywords: Cognitive; Cross-sectional; Impairment; Night sleep duration
MeSH: China; Cognitive Dysfunction; etiology; Cross-Sectional Studies; Female; Humans; Male; Middle Aged; Risk Factors; Sleep; physiology; Time Factors
From: Biomedical and Environmental Sciences 2017;30(10):749-757
CountryChina
Language:English
Abstract:
OBJECTIVEAlthough sleep is one of the most important health-related behavioral factors, the association between night sleep duration and cognitive impairment has not been fully understood. A cross-sectional study was conducted with a random sample of 2,514 participants (⋝ 40 years of age; 46.6% women) in China to examine the association between night sleep duration and cognitive impairment.
METHODSNight sleep duration was categorized as ⋜ 5, 6, 7, 8, or ⋝ 9 h per night. Cognitive function was measured using the Mini-Mental State Examination. A multivariate regression analysis was used to analyze the association of night sleep duration with cognitive impairment. A total of 122 participants were diagnosed with cognitive impairment.
RESULTSA U-shaped association between night sleep duration and cognitive impairment was found. The odds ratios (95% confidence intervals) of cognitive impairment (with 7 h of daily sleep being considered as the reference) for individuals reporting ⋜ 5, 6, 8, and ⋝ 9 h were 2.14 (1.20-3.83), 1.13 (0.67-1.89), 1.51 (0.82-2.79), and 5.37 (1.62-17.80), respectively (P ⋜ 0.01).
CONCLUSIONShort or long night sleep duration was an important sleep-related factor independently associated with cognitive impairment and may be a useful marker for increased risk of cognitive impairment..