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Age affects sleep microstructure more than sleep macrostructure
Stockholm University, Faculty of Social Sciences, Stress Research Institute. Karolinska Institute.
Stockholm University, Faculty of Social Sciences, Stress Research Institute. Karolinska Institute.
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2017 (English)In: Journal of Sleep Research, ISSN 0962-1105, E-ISSN 1365-2869, Vol. 26, no 3, 277-287 p.Article in journal (Refereed) Published
Abstract [en]

It is well known that the quantity and quality of physiological sleep changes across age. However, so far the effect of age on sleep microstructure has been mostly addressed in small samples. The current study examines the effect of age on several measures of sleep macro- and microstructure in 211 women (22–71 years old) of the ‘Sleep and Health in Women’ study for whom ambulatory polysomnography was registered. Older age was associated with significantly lower fast spindle (effect size f2 = 0.32) and K-complex density (f2 = 0.19) during N2 sleep, as well as slow-wave activity (log) in N3 sleep (f2 = 0.21). Moreover, total sleep time (f2 = 0.10), N3 sleep (min) (f2 = 0.10), rapid eye movement sleep (min) (f2 = 0.11) and sigma (log) (f2 = 0.05) and slow-wave activity (log) during non-rapid eye movement sleep (f2 = 0.09) were reduced, and N1 sleep (f2 = 0.03) was increased in older age. No significant effects of age were observed on slow spindle density, rapid eye movement density and beta power (log) during non-rapid eye movement sleep. In conclusion, effect sizes indicate that traditional sleep stage scoring may underestimate age-related changes in sleep.

Place, publisher, year, edition, pages
John Wiley & Sons, 2017. Vol. 26, no 3, 277-287 p.
Keyword [en]
REM, age, polysomnography, sleep, sleep spindles, spectral analysis
National Category
Psychology Neurology
Research subject
Psychology
Identifiers
URN: urn:nbn:se:su:diva-143883DOI: 10.1111/jsr.12478OAI: oai:DiVA.org:su-143883DiVA: diva2:1105290
Note

This study was supported by the Swedish Research Council for Health, Working Life and Welfare, and the Swedish Heart-Lung Foundation.

Available from: 2017-06-02 Created: 2017-06-02 Last updated: 2017-06-02

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CiteExportLink to record
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