Delayed sleep timings could lead to heart failure: CHEST
China: Sleeping late on weekdays may increase your risk of heart failure particularly in people having 6-8 hours of sleep duration, according to a recent study. The results of the study published in the journal CHEST indicates that a bedtime at 10:01 PM to 11:00 PM may be most suitable to reduce the risk of congestive heart failure (CHF).
The aim of the study by R. Li, Second Affiliated Hospital of Xi'an Jiaotong University, Department Of Critical Care Medicine, Xi'an, China, and colleagues was to explore the relationship between sleep timings and congestive heart failure.
For the purpose, the researchers conducted a prospective cohort (n=4765) with the Sleep Heart Health Study database. The participants were followed up until the diagnosis of the first CHF between the baseline and the final censoring date.
Key findings of the study include:
- During the mean follow-up period of 11 years, 519 cases of CHF (10.9%) occurred.
- The multivariable models revealed that participants with weekday bedtime at> 12:00 AM [hazard ratio (HR), 1.559] and 11:01PM to 12:00AM (HR, 1.253) had a higher risk of CHF compared with those with bedtime at 10:01 PM to 11:00 PM.
- After stratified analysis, the association was even intensified in participants with a sleep duration of 6-8 hours.
- Wake-up time at> 8:00 AM on weekdays (HR, 1.525) was also associated with a higher risk of incident CHF compared with wake-up time at≤6:00 AM.
- There was no relationship between sleep timings on weekends and CHF.
"Delayed sleep timings on weekdays may increase the risk of CHF, especially in individuals with 6-8 hours' sleep duration," wrote the authors. "Our findings indicate that a bedtime at 10:01 PM to 11:00 PM may be most suitable for individuals to reduce the risk of CHF," they concluded.
The study, "The relationship between sleep timing and congestive heart failure: A community-based cohort study," is published in the journal CHEST.
