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June 10, 2026European Journal of Preventive CardiologyOpen Access

Objectively Measured Individual-Level Daytime Versus Nighttime Light Exposure and Cardiovascular Disease Mortality in U.S. Adults

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Authors

JDJin DaiTulane UniversityWDWen DaiTulane UniversityXZXiaoyu ZongWashington University in St. Louis

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Implication

Population-based cohort study examines light exposure's impact on cardiovascular mortality risk in U.S. adults, suggesting significant effects.

Key Points

  • To investigate the relationship between daytime and nighttime light exposure and cardiovascular disease mortality risks.
  • Population-based retrospective cohort study of 7,607 U.S. adults from NHANES (2011-2014).
  • Participants wore an accelerometer for light measurement; CVD mortality data linked through National Death Index until 2019.
  • Cox models estimated hazard ratios for CVD mortality, adjusted for covariates like physical activity and sleep duration.
  • 233 CVD deaths occurred during a median follow-up of 6.8 years.
  • Greater differences in daytime versus nighttime light exposure linked to lower CVD mortality (per 1-hour increment: HR 0.88 [95% CI, 0.78-0.98]; Pnonlinearity=0.92).
  • No evidence of heterogeneity in associations by age or sex.

Cite This Study

Dai et al. (2026) studied this question.

synapsesocial.com/papers/6a2900566f82f25be989ce8dhttps://doi.org/10.1093/eurjpc/zwag303
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