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Sleep. 2011 Dec 1;34(12):1681-6. doi: 10.5665/sleep.1434.

Relation between self-reported sleep duration and arterial stiffness: a cross-sectional study of middle-aged Japanese civil servants.

Author information

1
Department of Public Heath Sciences, Hokkaido University Graduate School of Medicine, Sapporo, Japan. e-yoshi@med.hokudai.ac.jp

Abstract

OBJECTIVES:

The aim of this study is to examine the relationship between self-reported sleep duration and arterial stiffness in a large-scale Japanese study.

DESIGN:

Cross-sectional study.

SETTING:

Sapporo City, Hokkaido, Japan.

PARTICIPANTS:

Local government employees aged 35-62 years, who underwent annual health checkups from April 2003 to March 2004. After excluding those with incomplete data, data from 4,268 employees (males: 3,410) participants were analyzed.

INTERVENTIONS:

N/A.

MEASUREMENTS AND RESULTS:

Brachial-ankle pulse-wave velocity (baPWV) was investigated as an indicator of arterial stiffness. We used a self-administered questionnaire, which included items on daily sleep duration, lifestyle factors, and occupational factors. Sleep duration was classified into 5 categories; " ≤ 5 h," "6 h," "7 h," "8 h," and " ≥ 9 h." Results of multiple linear regression analysis after fully adjusting the model revealed that subjects with ≥ 9 h of daily sleep had significantly elevated baPWV values compared with the reference group with 7 h of sleep. Stratified analyses by sex showed that there was a significant association among male subjects only.

CONCLUSIONS:

Daily sleep duration ≥ 9 h was found to be associated with elevated values of baPWV. This suggests that there is an association between long sleep duration and arterial stiffness.

KEYWORDS:

Brachial-ankle pulse-wave velocity; Daily sleep duration; arterial stiffness; cardiovascular disease

PMID:
22131605
PMCID:
PMC3208845
DOI:
10.5665/sleep.1434
[Indexed for MEDLINE]
Free PMC Article

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