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  • Title: Self-reported Sleep Duration and Subclinical Atherosclerosis in a General Population of Japanese Men.
    Author: Suzuki S, Arima H, Miyazaki S, Fujiyoshi A, Kadota A, Takashima N, Hisamatsu T, Kadowaki S, Zaid M, Torii S, Horie M, Murata K, Miura K, Ueshima H, SESSA Research Group.
    Journal: J Atheroscler Thromb; 2018 Feb 01; 25(2):186-198. PubMed ID: 28747590.
    Abstract:
    AIM: There are few data regarding associations between sleep duration and subclinical atherosclerosis in Japan. The aim of this study was to evaluate associations of self-reported sleep duration with calcification in the coronary arteries (CAC) and carotid intima media thickness (IMT) in Japanese men. METHODS: This was a cross-sectional survey of 1093 randomly selected men from Kusatsu City, Japan. Average sleep duration on weekdays was estimated through questionnaire; CAC by computed tomography; and carotid IMT by ultrasonography. RESULTS: The prevalence of CAC was 50.0% for participants with sleep duration ＜5.5 h, 43.9% with 5.5-6.4 h, 50.0% with 6.5-7.4 h, 49.3% with 7.5-8.4 h, and 62.5% with ≥8.5 h. In univariate analysis, participants with sleep duration ≥8.5 h had significantly higher prevalence of CAC than those with 6.5-7.4 h (p=0.043). After adjustment for age and other risk factors, however, the association was not significant (p=0.776). The average IMT was 0.85 mm for participants with sleep duration ＜5.5 h, 0.83 mm with 5.5-6.4 h, 0.85 mm with 6.5-7.4 h, 0.88 mm with 7.5-8.4 h, and 0.90 mm with ≥8.5 h. None of the differences in IMT observed in crude or multivariable-adjusted analyses was significant (all p＞0.1). CONCLUSION: Self-reported sleep duration was not associated with increased CAC or carotid IMT in a general population of Japanese men.
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