AUTHOR=Huang Yi-Ming , Xia Wei , Ge Yi-Jun , Hou Jia-Hui , Tan Lan , Xu Wei , Tan Chen-Chen 

TITLE=Sleep duration and risk of cardio-cerebrovascular disease: A dose-response meta-analysis of cohort studies comprising 3.8 million participants

JOURNAL=Frontiers in Cardiovascular Medicine

VOLUME=Volume 9 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2022.907990

DOI=10.3389/fcvm.2022.907990

ISSN=2297-055X

ABSTRACT=Background: The effect of extreme sleep duration on the risk of cardiovascular and cerebrovascular diseases (CCDs) remains debatable. The pathology of CCDs is consistent in some respects (e.g., vascular factors), suggesting that there may be an overlapping range of sleep duration associated with a low risk of both diseases We aimed to quantify the dose-response relationship between sleep duration and CCDs.
Study Objective: To explore whether there is an optimal sleep duration (SD) in reducing the risk of CCDs.
Methods: PubMed and EMBASE were searched until June 24, 2022 to include cohort studies that investigated the longitudinal relationships of SD with incident CCDs, including stroke and coronary heart disease (CHD). The robusterror meta-¬regression model (REMR model) was conducted to depict the dose-response relationships based on multivariate-adjusted risk estimates.
Results: A total of 71 cohorts with 3.8 million participants were included for meta-analysis, including 57 for cardiovascular diseases (CVD) and 29 for cerebrovascular disease. A significant U-shaped relationship was revealed of nighttime sleep duration with either cardiovascular or cerebrovascular disease. The nighttime sleep duration associated with a lower risk of CVD was situated within 4.3-10.3 hours, with the risk hitting bottom at roughly 7.5 hours per night (pnonlinearity <0.0001). Sleep duration associated with a lower risk of cerebrovascular diseases ranges from 5 to 9.7 hours per night, with the inflexion at 7.5 hours per night (pnonlinearity =0.05). Similar nonlinear relationship exited in daily sleep duration and CCDs. Other subgroup analyses showed nonlinear relationships close to the above results.
Conclusions: Rational sleep duration (7.5 hours/night) is associated with a reduced risk of cardio-cerebrovascular disease for adults.