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Time to bed is associated with cognitive outcome: an analysis of sleep-times and wake-times in community-dwelling older adults

McHugh, Joanna E., Walsh, Lorcan and Lawlor, Brian A. (2014) Time to bed is associated with cognitive outcome: an analysis of sleep-times and wake-times in community-dwelling older adults. Biological Rhythm Research, 45 (1). pp. 103-114. ISSN 1744-4179

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Abstract

We investigated time to bed and to rise as markers of sleep phase in older adults, and how they relate to cognitive functioning. Participants were 505 community-dwelling adults over the age of 60, recruited via self-referral, GP referral and emergency department referral. Sleep information was measured using the Pittsburgh Sleep Quality Index. Cognition was measured using the CAMCOG, MMSE and Trail Making test. Age, gender, education level, loneliness and habitation information was collected and included in the analyses as covariates. Analyses of covariance were performed and results showed that early and late sleepers were significantly slower on attention, learning and praxis tasks than those whose bedtime did not differ significantly to the robust norm. Wake-times were not associated with cognitive functioning in this cohort. We conclude that there is an independent association between time to bed and cognition. These findings have implications for clinicians recommending sleep treatment to older patients.

Item Type: Article
Subjects: B Philosophy. Psychology. Religion > Psychology > Cognition
H Social Sciences > HV Social pathology. Social and public welfare > Welfare of older people
Divisions: School of Business > Staff Research and Publications
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Depositing User: CAOIMHE NI MHAICIN
Date Deposited: 02 Oct 2015 15:16
Last Modified: 02 Oct 2015 15:16
URI: http://trap.ncirl.ie/id/eprint/1984

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