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Afternoon napping and cognition in chinese older adults: Findings from the China Health and Retirement Longitudinal Study Baseline Assessment
Li, Junxin Cacchione, Pamela Z. Hodgson, Nancy Riegel, Barbara Keenan, Brendan T. Scharf, Mathew T. Richards, Kathy C. Gooneratne, Nalaka S.
Li, Junxin
Cacchione, Pamela Z.
Hodgson, Nancy
Riegel, Barbara
Keenan, Brendan T.
Scharf, Mathew T.
Richards, Kathy C.
Gooneratne, Nalaka S.
Abstract
Objectives: To examine the cross-sectional associations between self-reported postlunch napping and structured cognitive assessments in Chinese older adults. Design: Cross-sectional cohort study. Setting: China. Participants: Individuals aged 65 and older from the baseline national wave of the China Health and Retirement Longitudinal Study (CHARLS) (N = 2,974). Measurements: Interview-based cognitive assessments of orientation and attention, episodic memory, visuospatial abilities, and a combined global cognition score incorporating these assessments. Other self-reported or interview-based assessments included postlunch napping duration, nighttime sleep duration, demographic characteristics, health habits, comorbidities, functional status and social activities. According to reported napping duration, older adults were categorized as non-nappers (0 minutes), short nappers ( < 30 minutes), moderate nappers (30–90 minutes), and extended nappers ( > 90 minutes). Results: Postlunch napping was reporting in 57.7% of participants for a mean of 63 minutes. Cognitive function was significantly associated with napping (P < .001). Between-group comparisons showed that moderate nappers had better overall cognition than nonnappers (P < .001) or extended nappers (P = .01). Nonnappers also had significantly poorer cognition than short nappers (P = .03). In multiple regression analysis, moderate napping was significantly associated with better cognition than non- (P = .004), short (P= .04), and extended napping (P = .002), after controlling for demographic characteristics, body mass index, depression, instrumental activities of daily living, social activities, and nighttime sleep duration. Conclusion: A cross-sectional association was found between moderate postlunch napping and better cognition in Chinese older adults. The cross-sectional design and self-reported measures of sleep limited the findings. Longitudinal studies with objective napping measures are needed to further test this hypothesis.
Keywords
postlunch napping, sleep duration, cognition, older adults
Date
2017
Type
Journal article
Journal
Journal of the American Geriatrics Society
Book
Volume
65
Issue
2
Page Range
373-380
Article Number
ACU Department
Mary MacKillop Institute for Health Research
Faculty of Health Sciences
Faculty of Health Sciences
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Relation URI
Source URL
Event URL
Open Access Status
License
File Access
Controlled