Key result
Nighttime light exposure >3 lux linked to ~24% higher MI risk.
Why the study?
Does greater nighttime light exposure increase the risk of incident cardiovascular disease and adverse cardiovascular imaging phenotypes in adults?
Population
73,286 adults in the UK Biobank who wore a wrist accelerometer with a light sensor for 7 days between…
Comparison
Nighttime light exposure >3 lux vs No nighttime light exposure >3 lux
Design
Cohort
Follow-up
to 2022 for incident CVD, to 2024 for CVD mortality
Authors
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Objectively measured nighttime light exposure is associated with an increased risk of incident cardiovascular disease and adverse cardiac remodeling, suggesting that maintaining dark nights may promote cardiovascular health.
Cohort (n=73,286)
Does greater nighttime light exposure increase the risk of incident cardiovascular disease and adverse cardiovascular imaging phenotypes in adults?
Hazard Ratio: 1.24 (95% CI 1.07–1.44)
Objectively measured nighttime light exposure is associated with an increased risk of incident cardiovascular disease and adverse cardiac remodeling, suggesting that maintaining dark nights may promote cardiovascular health.
Dai et al. (2026) reported a cohort. Nighttime light exposure >3 lux vs. None (no nighttime light exposure >3 lux) was evaluated on Incident myocardial infarction (HR 1.24, 95% CI 1.07-1.44). Greater nighttime light exposure (>3 lux) was associated with higher risk of myocardial infarction (HR 1.24; 95% CI 1.07-1.44), stroke, heart failure, atrial fibrillation, and CVD mortality.
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