Ethnic differences in sleep duration and morning-evening type in a population sample

Area of Science:

• Epidemiology
• Sleep Science
• Public Health

Background:

• Sleep duration and chronotype are crucial for cardiometabolic health.
• Sociodemographic factors, particularly ethnicity, may influence sleep patterns.
• Understanding these associations is vital for targeted health interventions.

Purpose of the Study:

• To investigate the relationship between sleep duration, morning-evening type, and cardiometabolic disease.
• To examine how sociodemographic factors, including ethnicity, are associated with sleep behaviors.
• To inform the development of multidimensional approaches for cardiometabolic health.

Main Methods:

• Cross-sectional population study utilizing UK Biobank data (N = 439,933).
• Multivariable Poisson regression models were employed to assess associations.
• Models were adjusted for key sociodemographic variables (sex, race, education, employment, age).

Main Results:

• 25% of participants reported short sleep duration.
• Sleep chronotypes were distributed as 27% morning, 64% intermediate, and 9% evening.
• Black ethnicity showed the strongest association with sleep behavior, with short sleep twice as prevalent and morning type 1.4 times more prevalent compared to White participants.

Conclusions:

• Black individuals demonstrated a higher prevalence of short sleep and morning chronotypes.
• These findings suggest that sleep-based interventions for cardiometabolic health require a multidimensional approach.
• Consideration of adequate sleep and circadian alignment is essential, particularly within specific ethnic groups.