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

Dayna A. Johnson, Michelle Reid, Thanh Huyen T. Vu, Linda C. Gallo, Martha L. Daviglus, Carmen R. Isasi, Susan Redline, Mercedes Carnethon

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
JournalSleep Health
DOIs
StateAccepted/In press - 2020

Keywords

  • Cardiometabolic risk factors
  • Hispanic/Latino
  • Minority health
  • Sleep
  • Social jetlag
  • Youth

ASJC Scopus subject areas

  • Behavioral Neuroscience

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    Johnson, D. A., Reid, M., Vu, T. H. T., Gallo, L. C., Daviglus, M. L., Isasi, C. R., Redline, S., & Carnethon, M. (Accepted/In press). Associations of sleep duration and social jetlag with cardiometabolic risk factors in the study of Latino youth. Sleep Health. https://doi.org/10.1016/j.sleh.2020.02.017