Self-Reported Outdoor Light Exposure Time and Incident Heart Failure
Ziteng Zhang1, Bowei Yu1, Ying Sun1
1Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Shanghai JiaoTong University School of Medicine Shanghai China.
Journal of the American Heart Association
|February 13, 2024
Summary
Exposure to moderate outdoor light may help prevent heart failure. Both too little and too much daily light exposure were linked to an increased risk of heart failure incidence.
Area of Science:
- Cardiology
- Public Health
- Environmental Health
Background:
- Heart failure is a significant public health concern.
- A healthy lifestyle is crucial for heart failure prevention.
- The impact of outdoor light exposure on heart failure risk remains unclear.
Purpose of the Study:
- To investigate the association between time spent outdoors in light and the risk of developing heart failure.
- To explore potential nonlinear relationships in this association.
Main Methods:
- A cohort study utilizing UK Biobank data from 2006-2010.
- Inclusion of participants aged 40-70 years, free of heart failure at baseline.
- Analysis of self-reported outdoor light exposure and heart failure incidence over a mean follow-up of 12.61 years using Cox proportional hazard models and restricted cubic splines.
Main Results:
- A J-shaped, nonlinear association was observed between outdoor light exposure time and heart failure risk.
- Participants with less than 1.0 hour or more than 2.5 hours of daily outdoor light exposure showed a significantly higher risk of heart failure compared to those with 1.0-2.5 hours.
- Hazard ratios (HRs) for <1.0 hour and >2.5 hours were 1.10 (95% CI, 1.03-1.18) and 1.07 (95% CI, 1.03-1.11) respectively in fully adjusted models.
Conclusions:
- Moderate outdoor light exposure (1.0-2.5 hours/day) is associated with a lower risk of incident heart failure.
- Both insufficient and excessive outdoor light exposure may increase heart failure risk.
- Optimizing daily outdoor light exposure could be a potential strategy for heart failure prevention.
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