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Gender-specific associations of short sleep duration with\ud prevalent and incident hypertension : the Whitehall II Study

By Francesco Cappuccio, Saverio Stranges, Ngianga-Bakwin Kandala, Michelle A. Miller, Frances M. Taggart, Meena Kumari, Jane E. Ferrie, Martin J. Shipley, Eric Brunner and Michael G. Marmot

Abstract

Sleep deprivation (5 hour per night) was associated with a higher risk of hypertension in middle-aged\ud American adults but not among older individuals. However, the outcome was based on self-reported diagnosis of\ud incident hypertension, and no gender-specific analyses were included. We examined cross-sectional and prospective\ud associations of sleep duration with prevalent and incident hypertension in a cohort of 10 308 British civil servants aged\ud 35 to 55 years at baseline (phase 1: 1985–1988). Data were gathered from phase 5 (1997–1999) and phase 7\ud (2003–2004). Sleep duration and other covariates were assessed at phase 5. At both examinations, hypertension was\ud defined as blood pressure 140/90 mm Hg or regular use of antihypertensive medications. In cross-sectional analyses\ud at phase 5 (n5766), short duration of sleep (5 hour per night) was associated with higher risk of hypertension\ud compared with the group sleeping 7 hours, among women (odds ratio: 2.01; 95% CI: 1.13 to 3.58), independent of\ud confounders, with an inverse linear trend across decreasing hours of sleep (P0.003). No association was detected in\ud men. In prospective analyses (mean follow-up: 5 years), the cumulative incidence of hypertension was 20.0% (n740)\ud among 3691 normotensive individuals at phase 5. In women, short duration of sleep was associated with a higher risk\ud of hypertension in a reduced model (age and employment) (6 hours per night: odds ratio: 1.56 [95% CI: 1.07 to 2.27];\ud 5 hour per night: odds ratio: 1.94 [95% CI: 1.08 to 3.50] versus 7 hours). The associations were attenuated after\ud accounting for cardiovascular risk factors and psychiatric comorbidities (odds ratio: 1.42 [95% CI: 0.94 to 2.16]; odds\ud ratio: 1.31 [95% CI: 0.65 to 2.63], respectively). Sleep deprivation may produce detrimental cardiovascular effects\ud among women. (Hypertension. 2007;50:694-701.)\ud Key Words: sleep duration blood pressure hypertension gender differences confounders comorbiditie

Topics: RC
Publisher: American Heart Association
Year: 2007
OAI identifier: oai:wrap.warwick.ac.uk:176

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