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Daytime napping and the risk of all-cause and cause-specific mortality : a 13-year follow-up of a British population

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Leng, Y., Wainwright, Nick W. J., Cappuccio, Francesco, Surtees, Paul G., Hayat, S, Luben, Robert, Brayne, Carol and Khaw, Kay-Tee (2014) Daytime napping and the risk of all-cause and cause-specific mortality : a 13-year follow-up of a British population. American Journal of Epidemiology, 179 (9). pp. 1115-1124. doi:10.1093/aje/kwu036

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Official URL: https://doi.org/10.1093/aje/kwu036

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Abstract

Epidemiologic studies have reported conflicting results on the relationship between daytime napping and mortality risk, and there are few data on the potential association in the British population. We investigated the associations between daytime napping and all-cause or cause-specific mortality in the European Prospective Investigation Into Cancer-Norfolk study, a British population-based cohort study. Among the 16,374 men and women who answered questions on napping habits between 1998 and 2000, a total of 3,251 died during the 13-year follow-up. Daytime napping was associated with an increased risk of all-cause mortality (for napping less than 1 hour per day on average, hazard ratio = 1.14, 95% confidence interval: 1.02, 1.27; for napping 1 hour or longer per day on average, hazard ratio = 1.32, 95% confidence interval: 1.04, 1.68), independent of age, sex, social class, educational level, marital status, employment status, body mass index, physical activity level, smoking status, alcohol intake, depression, self-reported general health, use of hypnotic drugs or other medications, time spent in bed at night, and presence of preexisting health conditions. This association was more pronounced for death from respiratory diseases (for napping less than 1 hour, hazard ratio = 1.40, 95% confidence interval: 0.95, 2.05; for napping 1 hour or more, hazard ratio = 2.56, 95% confidence interval: 1.34, 4.86) and in individuals 65 years of age or younger. Excessive daytime napping might be a useful marker of underlying health risk, particularly of respiratory problems, especially among those 65 years of age or younger. Further research is required to clarify the nature of the observed association.

Item Type: Journal Article
Subjects: Q Science > QP Physiology
Divisions: Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Health Sciences > Mental Health and Wellbeing
Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School
Library of Congress Subject Headings (LCSH): Naps (Sleep), Death -- Causes, Death -- Great Britain
Journal or Publication Title: American Journal of Epidemiology
Publisher: Oxford University Press
ISSN: 0002-9262
Official Date: 1 May 2014
Dates:
DateEvent
1 May 2014Published
30 March 2014Available
Volume: 179
Number: 9
Page Range: pp. 1115-1124
DOI: 10.1093/aje/kwu036
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
G9502233Medical Research Councilhttp://dx.doi.org/10.13039/501100000265
G1000143Medical Research Councilhttp://dx.doi.org/10.13039/501100000265
SP2024/0204Cancer Research UKhttp://dx.doi.org/10.13039/501100000289
C864/A14136Cancer Research UKhttp://dx.doi.org/10.13039/501100000289
UNSPECIFIEDCambridge Commonwealth, European and International Trusthttp://dx.doi.org/10.13039/501100003343
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