Cited by 175Sleep and related disordersCircadian rhythm and melatoninSleep and Work-Related Fatigue

Mortality related to actigraphic long and short sleep

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Kripke, Daniel F., Langer, Robert D., Elliott, Jeffrey A., Klauber, Melville R., Rex, Katharine M.·2011·Sleep Medicine

Abstract

Background The folk belief that we should sleep 8 h seems to be incorrect. Numerous studies have shown that self-reported sleep longer than 7.5 h or shorter than 6.5 h predicts increased mortality risk. This study examined if prospectively-determined objective sleep duration, as estimated by wrist actigraphy, was associated with mortality risks.Methods From 1995-1999, women averaging 67.6 years of age provided one-week actigraphic recordings. Survival could be estimated from follow-up continuing until 2009 for 444 of the women, with an average of 10.5 years before censoring. Multivariate age-stratified Cox regression models were controlled for history of hypertension, diabetes, myocardial infarction, cancer, and major depression.Results Adjusted survival functions estimated 61% survival (54-69%, 95% C.I.) for those with sleep less than 300 min and 78% survival (73-85%, 95% C.I.) for those with actigraphic sleep longer than 390 min, as compared with survival of 90% (85-94%, 95% C.I.) for those with sleep of 300-390 min. Time-in-bed, sleep efficiency and the timing of melatonin metabolite excretion were also significant mortality risk factors.Conclusion This study confirms a U-shaped relationship between survival and actigraphically measured sleep durations, with the optimal objective sleep duration being shorter than the self-report optimums. People who sleep five or six hours may be reassured. Further studies are needed to identify any modifiable factors for this mortality and possible approaches to prevention.

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Crossref · 10.1016/j.sleep.2010.04.016

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Authors
Kripke, D. F., Langer, R. D., Elliott, J. A., Klauber, M. R., & Rex, K. M.
Affiliations
University of California San Diego (US)
Corresponding author
Kripke, Daniel F.
Venue
Sleep Medicine
Publisher
Elsevier BV
Published
2011-01
Volume
12
Issue
1
Pages
28-33
ISSN
1389-9457 (ISSN-L)
OpenAlex
W2036038249
Cited by
175
References
21
Citations by year
2026: 2 · 2025: 5 · 2024: 6 · 2023: 10 · 2022: 13 · 2021: 8 · 2020: 11 · 2019: 22 · 2018: 8 · 2017: 11 · 2016: 14 · 2015: 11 · 2014: 11 · 2013: 24 · 2012: 8
FWCI
17.91
Type
journal article
Language
en
Open access
Locations
  • Sleep Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • NIH HL55983
  • HL071123
  • NO1-WH-3-2120
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
Keywords
sleep duration, mortality, actigraphy, U-shaped relationship, time in bed, sleep efficiency, women, self-reported sleep
MeSH terms
Aged, Female, Humans, Mortality, Prospective Studies, Risk Factors, Sleep, Time Factors, Multivariate Analysis, Proportional Hazards Models, Actigraphy

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