Associations of sleep duration and social jetlag with cardiometabolic risk factors in the study of Latino youth

Sleep Health. 2020 Oct;6(5):563-569. doi: 10.1016/j.sleh.2020.02.017. Epub 2020 Apr 23.


Objective: We investigated associations of sleep duration and social jetlag with cardiometabolic outcomes.

Participants: Boys and girls aged 8-16 years from the Hispanic Community Health Study/Study of Latino Youth.

Measurements: Participants (n = 1,208) completed a clinical examination where anthropometric characteristics, health behaviors, and health history were measured. Sleep duration was calculated as the weighted average of self-reported weekday and weekend bedtimes and wake times and categorized into age-specific cutoffs for short vs. normal sleep. "Social jetlag" was defined as the absolute difference in the midpoint of the sleep period between weekdays and weekends, measured continuously and dichotomized (≥2 hours), with higher values indicating more displacement of sleep timing across the week. Regression models tested the associations between sleep measures (separately) and cardiometabolic outcomes (e.g., healthy eating index [0-100], physical activity-minutes per week, obesity, diabetes, hypertension) after adjustment for covariates.

Results: The average sleep duration was 9.5 hours (95% confidence interval: 9.3, 9.6) and the mean social jetlag was 2.5 (2.4, 2.7) hours. Participants with social jetlag reported more physical activity (β = 34.8 [13.14], P < .01), had a higher healthy eating index (β = 1.77 [0.87], P < .05] and lower odds of being overweight [OR = 0.66, (95% confidence interval 0.44, 0.99)]. Short sleep duration was associated with less physical activity but did not relate to other cardiometabolic outcomes.

Conclusions: Social jetlag was associated with healthier behaviors and a lower odds of being overweight. Given these mixed findings, future research should further evaluate how to best characterize sleep timing differences in youth to identify health consequences.

Keywords: Cardiometabolic risk factors; Hispanic/Latino; Minority health; Sleep; Social jetlag; Youth.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Cardiometabolic Risk Factors
  • Child
  • Female
  • Hispanic or Latino / psychology*
  • Hispanic or Latino / statistics & numerical data
  • Humans
  • Jet Lag Syndrome / ethnology*
  • Male
  • Sleep*
  • Time Factors