January 12, 2015
Journal of the American Heart Association
TAKE-HOME MESSAGE
- A total of 7690 men and nonpregnant women between the ages of 40 and 79 years who participated in a National Health and Nutrition Examination Survey were analyzed to evaluate the association between self-reported sleep duration and predicted 10-year cardiovascular risk. After adjustment for covariates, the predicted 10-year cardiovascular risk among participants who reported sleeping at most 5, 6, 7, 8, and 9 hours and at least 10 hours per night was 4.0%, 3.6%, 3.4%, 3.5%, 3.7%, and 3.7%, respectively. However, after maximal adjustment, sleep duration was not associated with a cardiovascular risk of 20% or greater.
- The authors conclude that the mean predicted 10-year cardiovascular risk was lowest for adults who reported sleeping 7 hours a night, and it increased for self-reported sleep hours less than and greater than 7 hours per night.
Abstract
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 self-reported 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 age-adjusted 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.