Habitual sleep duration and predicted 10-year cardiovascular risk using the pooled cohort risk equations among US adults

Background: the association between sleep duration and predicted cardiovascular risk has been poorly characterized. the objective of this study was to examine the association between self-reported sleep duration and predicted 10-year cardiovascular risk among us adults. methods and results: data from 7690 men and nonpregnant women who were aged 40 to 79 years,who were free of selfreported heart disease and stroke,and who participated in a national health and nutrition examination survey from 2005 to 2012 were analyzed. sleep duration was self-reported. predicted 10-year cardiovascular risk was calculated using the pooled cohort equations. among the included participants,13.1% reported sleeping ≤5 hours,24.4% reported sleeping 6 hours,31.9% reported sleeping 7 hours,25.2% reported sleeping 8 hours,4.0% reported sleeping 9 hours,and 1.3% reported sleeping ≥10 hours. after adjustment for covariates,geometric mean-predicted 10-year cardiovascular risk was 4.0%,3.6%,3.4%,3.5%,3.7%,and 3.7% among participants who reported sleeping ≤5,6,7,8,9,and ≥10 hours per night,respectively (pwald chi-square < 0.001). the ageadjusted percentages of predicted cardiovascular risk ≥20% for the 6 intervals of sleep duration were 14.5%,11.9%,11.0%,11.4%,11.8%,and 16.3% (pwald chi-square=0.022). after maximal adjustment,however,sleep duration was not significantly associated with cardiovascular risk ≥20% (pwald chi-square=0.698). conclusions: mean-predicted 10-year cardiovascular risk was lowest among adults who reported sleeping 7 hours per night and increased as participants reported sleeping fewer and more hours. © 2014 the authors.