Discussion
death, septicemia, malignant neoplasm, accidents, diabetes
SEPTICEMIA, CVD, MALIGNANT NEOPLASM, HYPERTENSION, CEREBROVASCULAR DISEASE, DIABETES
In this large community‐based study, we investigated the role of objective and self‐reported sleep duration in all‐cause and CVD mortality. The effects of objective and self‐reported sleep duration on mortality differed. A J‐shaped association of self‐reported sleep duration on weekdays and weekends with all‐cause and CVD mortality was observed. We also found that all‐cause and CVD mortality rates decreased gradually with increasing objective sleep duration.Research on the relationship between sleep duration and all‐cause and CVD mortality is inconsistent.Sleep questionnaires, commonly used to evaluate self‐reported sleep duration in epidemiological studies, do not correspond closely to objectively measured sleep duration.The biological mechanisms underlying the potential association between sleep duration and all‐cause and CVD mortality are not yet fully understood. Our findings reveal that objectively measured and self‐reported short sleep duration had an obviously high rate of all‐cause and CVD mortality. It may be because short sleep duration has been linked to 7 (including CVD, malignant neoplasm, cerebrovascular disease, accidents, diabetes, septicemia, and hypertension) of the 15 leading causes of death in America.The current study, based on a community‐based population, reported the association of objective and self‐reported sleep duration with all‐cause and CVD mortality that may be available to the general population. We highlight the different characteristics of the effects of objective and self‐reported sleep duration on mortality. This study had several limitations. Most of the individuals were of White race and middle‐aged or older; our findings may not apply to other ethnic groups or younger individuals. We did not include socioeconomic status because of a lack of relevant information in SHHS data sets. Moreover, the objective sleep duration in this study was monitored using single‐night in‐home polysomnography. Nocturnal variability in sleep duration may exist and affect the strength of observed associations.