Longitudinal associations between objective sleep and lipids: the CARDIA study.

Area of Science:

• Cardiovascular Health
• Sleep Science
• Lipid Metabolism

Background:

• Cardiovascular disease remains a leading cause of mortality globally.
• Lipid profiles are key indicators of cardiovascular risk.
• Objective sleep measures are increasingly recognized for their role in health outcomes.

Purpose of the Study:

• To examine the longitudinal associations between objective sleep duration and fragmentation with lipid levels.
• To determine if sleep parameters predict changes in total cholesterol, HDL, LDL, triglycerides, and TC/HDL ratio over a decade.

Main Methods:

• Utilized longitudinal data from 503 adults in the Coronary Artery Risk Development in Young Adults Sleep Study.
• Assessed sleep duration and fragmentation using wrist actigraphy over 6 days.
• Measured lipid profiles (TC, HDL, LDL, TG, TC/HDL ratio) at baseline, 5-year, and 10-year follow-ups.

Main Results:

• Each hour increase in objective sleep duration was significantly associated with higher total cholesterol and LDL levels.
• Increased sleep duration was also linked to higher triglycerides in men.
• Sleep fragmentation and self-reported sleep quality did not demonstrate significant associations with lipid profile changes.

Conclusions:

• Longer objective sleep duration is longitudinally associated with a poorer lipid profile over 10 years, independent of covariates.
• Objective sleep fragmentation and subjective sleep quality were not found to be related to adverse lipid changes in this cohort.