Optimal cutoffs of sleep timing and sleep duration for cardiovascular risk factors
Authors' conclusion
Bedtime between 10:00 PM to 11:00 PM, early MSFsc, and short sleep durations were appropriate for assessing CVD risk factors.
Study context
- Population
- Adults aged 19 or over, Korea National Health and Nutrition Examination Surveys; 8,107 men and 10,570 women
- Participants
- 18,677 adults
- Outcome
- Optimal cutoffs of sleep timing (bedtime, MSFsc) and sleep duration for assessing obesity, hypertension (HTN), diabetes mellitus (DM), dyslipidemia and metabolic syndrome, by sex (covariate-adjusted ROC curve)
Main finding
As reported in the abstract
Optimal sleep-related cutoffs for cardiovascular disease (CVD) risk factors
Bedtime cutoff, men
9:00 PM to 0:30 AM
Bedtime cutoff, women
10:00 PM to 11:00 PM
Optimal MSFsc cutoff points
12:00 AM to 3:00 AM
Sleep duration associated with optimal cutoffs
around 6 h
Observational data: associations, not effects.
Further findings
Bedtime cutoff, age ≥65 years
- Men ≥65 years
- 9:00 PM to 11:00 PM
- Women ≥65 years
- 9:00 PM to 12:00 AM
- Slightly earlier than for participants <65 years
Original publication
Optimal cutoffs of sleep timing and sleep duration for cardiovascular risk factors. Diabetes Res Clin Pract. Published 4 September 2023. doi:10.
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