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Carbon Monoxide Poisoning and Developing Ischemic Heart Disease: A Nationwide Population-Based Nested Case-Control
Yewon Bahng1,2, Kiook Baek3, Jong-Tae Park3
1Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul 00826, Korea.
Toxics
|October 22, 2021
Summary
Carbon monoxide (CO) poisoning significantly increases the risk of ischemic heart disease (IHD). This risk is elevated in younger individuals and those with comorbidities, persisting for years after exposure.
Area of Science:
- Cardiovascular Epidemiology
- Toxicology
Background:
- Case reports suggest a link between carbon monoxide (CO) poisoning and ischemic heart disease (IHD).
- Large-scale epidemiological evidence establishing this association has been lacking.
Purpose of the Study:
- To investigate the association between CO poisoning and the subsequent risk of IHD.
- To identify risk factors and temporal patterns of IHD following CO exposure.
Main Methods:
- A nested case-control study utilizing South Korea's nationwide health database.
- 28,113 patients with CO poisoning were matched with 28,113 controls by sex and age.
- Conditional logistic regression analysis was employed.
Main Results:
- CO poisoning was associated with a significantly higher risk of IHD (adjusted HR, 2.16).
- The risk was substantially higher in individuals under 40 (adjusted HR, 4.85) and those with comorbidities (adjusted HR, 10.69).
- Elevated IHD risk persisted long-term, peaking within two years post-exposure (adjusted HR, 11.12) and remaining significant after six years (adjusted HR, 1.55).
Conclusions:
- CO poisoning is a significant risk factor for developing IHD.
- The increased IHD risk is particularly pronounced in younger populations and those with pre-existing conditions.
- Long-term cardiovascular monitoring is warranted for individuals with a history of CO poisoning.
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