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Association of Sleep Characteristics and Cognition in Older Community-Dwelling Men: the MrOS Sleep Study

Association of Sleep Characteristics and Cognition in Older Community-Dwelling Men: the MrOS... AbstractStudy Objectives:To examine the association of objectively and subjectively measured sleep characteristics with cognition in older men.Design:A population-based cross-sectional study.Setting:6 centers in the United States.Participants:3,132 community-dwelling older men (mean age 76.4 ± 5.6 years).Interventions:None.Measurements and Results:Objectively measured sleep predictors from wrist actigraphy were total sleep time (TST), sleep efficiency (SE), and wake after sleep onset (WASO). Subjective sleep predictors were self-reported poor sleep (Pittsburgh Sleep Quality Index [PSQI] > 5), excessive daytime sleepiness (EDS, Epworth Sleepiness Scale Score > 10), and TST. Cognitive outcomes were measured with the Modified Mini-Mental State examination (3MS), the Trails B test, and the Digit Vigilance Test (DVT). After adjustment for multiple potential confounders, WASO was modestly related to poorer cognition. Compared to those with WASO < 90 min, men with WASO ≥ 90 min took 6.1 sec longer to complete the Trails B test and had a 0.9-point worse 3MS score, on average (P < 0.05). Actigraphically measured long sleepers had a slightly worse 3MS score compared to those with 7-8 h of sleep, but had similar Trails B and DVT completion times. Compared to those who self-reported sleeping 7-8 h, long sleepers (> 8 h) on average took 8.6 sec more to complete the Trails B test, had a 0.6-point worse 3MS score, and took 46 sec longer to complete the DVT (P < 0.05). PSQI and EDS were not independently related to cognitive outcomes.Conclusions:There were modest cross-sectional associations of WASO and self-reported long sleep with cognition among older community-dwelling men. EDS and PSQI were not related to cognition. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png SLEEP Oxford University Press

Association of Sleep Characteristics and Cognition in Older Community-Dwelling Men: the MrOS Sleep Study

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References (41)

Publisher
Oxford University Press
Copyright
© 2011 Associated Professional Sleep Societies, LLC.
ISSN
0161-8105
eISSN
1550-9109
DOI
10.5665/SLEEP.1276
pmid
21966066
Publisher site
See Article on Publisher Site

Abstract

AbstractStudy Objectives:To examine the association of objectively and subjectively measured sleep characteristics with cognition in older men.Design:A population-based cross-sectional study.Setting:6 centers in the United States.Participants:3,132 community-dwelling older men (mean age 76.4 ± 5.6 years).Interventions:None.Measurements and Results:Objectively measured sleep predictors from wrist actigraphy were total sleep time (TST), sleep efficiency (SE), and wake after sleep onset (WASO). Subjective sleep predictors were self-reported poor sleep (Pittsburgh Sleep Quality Index [PSQI] > 5), excessive daytime sleepiness (EDS, Epworth Sleepiness Scale Score > 10), and TST. Cognitive outcomes were measured with the Modified Mini-Mental State examination (3MS), the Trails B test, and the Digit Vigilance Test (DVT). After adjustment for multiple potential confounders, WASO was modestly related to poorer cognition. Compared to those with WASO < 90 min, men with WASO ≥ 90 min took 6.1 sec longer to complete the Trails B test and had a 0.9-point worse 3MS score, on average (P < 0.05). Actigraphically measured long sleepers had a slightly worse 3MS score compared to those with 7-8 h of sleep, but had similar Trails B and DVT completion times. Compared to those who self-reported sleeping 7-8 h, long sleepers (> 8 h) on average took 8.6 sec more to complete the Trails B test, had a 0.6-point worse 3MS score, and took 46 sec longer to complete the DVT (P < 0.05). PSQI and EDS were not independently related to cognitive outcomes.Conclusions:There were modest cross-sectional associations of WASO and self-reported long sleep with cognition among older community-dwelling men. EDS and PSQI were not related to cognition.

Journal

SLEEP – Oxford University Press

Published: Oct 1, 2011

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