Association Between Habitual Night Sleep Duration and Predicted 10-Year Cardiovascular Risk by Sex Among Young and Middle-Aged Adults

PURPOSE: We hypothesize the association between sleep duration and cardiovascular disease (CVD) risk varies with age category; however, evidence for the relationship between sleep duration and CVD risk among young and middle-aged adults remains scarce. This research aims to assess the association between night sleep duration and cardiovascular risk by sex among young and middle-aged Chinese adults. PATIENTS AND METHODS: We used the baseline data of a cohort of adults for physical examination by stratified cluster sampling. The Framingham risk score and the Pittsburgh Sleep Quality Index were used to measure CVD risk and sleep duration, respectively. Demographic characteristics, lifestyle factors, height, weight, total cholesterol (TC), and high-density lipoprotein cholesterol (HDL-C) were collected. We performed multiple logistic regressions to examine the association between night sleep duration and the predicted cardiovascular risk. RESULTS: We included 27,547 participants aged 18–64 years free of CVD, cerebral stroke, and not taking lipid-lowering agents. Overall, 12.7%, and 20.4% were at medium and high predicted CVD risk, respectively; 11.9% and 12.3% reported short and long sleep, respectively. Short sleep was independently associated with 23% (95% CI: 1.08–1.40) increased odds of medium-to-high CVD risk and 26% (95% CI: 1.11–1.45) increased odds of high CVD risk among females. Whereas long sleep was independently associated with 17% (95% CI: 0.71–0.98) decreased odds of medium-to-high CVD risk among males. CONCLUSION: Among young and middle-aged adults, long sleep was associated with decreased odds of CVD risk in males, whereas short sleep was associated with increased odds of cardiovascular risk in females.