Association of Objective and Self-Reported Sleep Duration With All-Cause and Cardiovascular Disease Mortality: A...

Area of Science:

• Sleep Medicine
• Epidemiology
• Public Health

Background:

• Previous research indicates a link between self-reported sleep duration and mortality.
• Objective measures of sleep duration have not been extensively compared with self-reported data regarding mortality outcomes.

Purpose of the Study:

• To compare the association of objective versus self-reported sleep duration with all-cause and cardiovascular disease (CVD) mortality.
• To investigate the impact of different sleep durations on mortality risk in a large cohort.

Main Methods:

• Utilized data from the Sleep Heart Health Study (SHHS) including 2341 men and 2686 women (mean age 63.9 years).
• Objective sleep duration was measured via polysomnography; self-reported duration was collected through questionnaires.
• Multivariable Cox regression analysis was employed to assess mortality associations over an 11-year follow-up period.

Main Results:

• All-cause and CVD mortality rates decreased with increasing objective sleep duration.
• An objective sleep duration of 5 hours or less showed the strongest association with increased all-cause and CVD mortality.
• Self-reported sleep duration exhibited a J-shaped association with mortality, with both short (≤4 hours) and long (>8 hours) durations linked to higher risk.

Conclusions:

• Both objective and self-reported sleep duration are associated with all-cause and CVD mortality.
• Objective sleep duration of 5 hours or less poses the highest mortality risk.
• Discrepancies exist between objective and self-reported sleep duration's impact on mortality, highlighting the importance of objective measures.