Content area
Full text
Environ Health Prev Med (2013) 18:215220 DOI 10.1007/s12199-012-0309-3
REGULAR ARTICLE
The relation between habitual sleep duration and blood pressure values in Japanese male subjects
Hiroki Satoh Jun Nishihira Tatsuhiko Wada
Satoshi Fujii Hiroyuki Tsutui
Received: 29 August 2012 / Accepted: 30 September 2012 / Published online: 21 October 2012 The Japanese Society for Hygiene 2012
AbstractBackground Previous studies have demonstrated that sleep duration is closely associated with metabolic risk factors. However, the relationship between habitual sleep duration and blood pressure values in Japanese population has not been fully established.
Methods We performed a cross-sectional study of 1,670 Japanese male subjects to clarify the relationship between habitual sleep duration and blood pressure values. The study subjects were divided into four groups (\6, 6-, 7-, and C8 h) according to their nightly habitual sleep duration.
Results The rate of subjects with \6, 6-, 7-, and C8 h sleep duration was 12.0, 37.6, 38.2, and 12.2 %, respectively. Compared with the group with 7-h sleep duration (referent), the\6 and C8 h groups had signicantly greater systolic and diastolic blood pressure values. The rate of hypertensive subjects, dened as systolic blood pressure C140 mmHg and/or diastolic blood pressure C90 mmHg, with sleep duration of \6, 6-, 7-, and C8 h was 13.4, 5.7,7.5, and 13.8 %, respectively. Compared with the group with 7-h sleep duration (referent), the multivariate odds
ratios (95 % condence interval) of the groups with\6 and C8 h for hypertension was 2.43 (1.404.20, P \ 0.01) and2.28 (1.313.95, P \ 0.01), respectively, adjusted for conventional cardiovascular risk factors.
Conclusion The present study demonstrates that both long and short habitual sleep duration were signicantly associated with high blood pressure values and hypertension occurrence in Japanese male subjects.
Keywords Sleep duration Blood pressure
Hypertension Japanese male subjects Epidemiology
Introduction
Sleep loss, long-term sleep deprivation, and alterations in sleep duration are common in modern society [1], with evidence showing that we are sleeping on average only6.8 h per night, which is 1.5 h less than we did 100 years ago [2]. Change of sleep condition exerts deleterious effects on detectable changes in metabolic [3, 4], endocrine [5], and sympathetic tone [6]. These ndings suggest that alterations of habitual sleep duration may predispose to overt change of blood pressure values....