Key result
Reduced lung function and emphysema are correlated with subclinical atherosclerosis in the general population, but this association is largely explained by shared cardiovascular risk factors and lacks evidence of a causal relationship.
Why the study?
Reduced lung function is associated with cardiovascular mortality, but its relationships with atherosclerosis remain unclear.
Is reduced lung function causally associated with subclinical atherosclerosis in the general population?
Cross-Sectional (n=29,593)
Yes
Is reduced lung function causally associated with subclinical atherosclerosis in the general population?
Reduced lung function is correlated with atherosclerosis but is likely not causally related, suggesting it should not be added to conventional risk models but can serve as a marker for underlying risk.
Does not support adding lung function to atherosclerosis risk models; confirms shared factors explain the link and leaves causality open.
Reduced lung function is associated with cardiovascular mortality, but the relationships with atherosclerosis are unclear. The population-based Swedish CArdioPulmonary BioImage study measured lung function, emphysema, coronary CT angiography, coronary calcium, carotid plaques and ankle-brachial index in 29,593 men and women aged 50-64 years. The results were confirmed using 2-sample Mendelian randomization. Lower lung function and emphysema were associated with more atherosclerosis, but these relationships were attenuated after adjustment for cardiovascular risk factors. Lung function was not associated with coronary atherosclerosis in 14,524 never-smokers. No potentially causal effect of lung function on atherosclerosis, or vice versa, was found in the 2-sample Mendelian randomization analysis. Here we show that reduced lung function and atherosclerosis are correlated in the population, but probably not causally related. Assessing lung function in addition to conventional cardiovascular risk factors to gauge risk of subclinical atherosclerosis is probably not meaningful, but low lung function found by chance should alert for atherosclerosis.
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Engström et al. (2024) conducted a cross-sectional in Subclinical atherosclerosis (n=29,593). Reduced lung function and emphysema vs. Normal lung function was evaluated on Subclinical atherosclerosis (assessed via coronary CT angiography, coronary calcium, carotid plaques, and ankle-brachial index). Reduced lung function and emphysema are correlated with subclinical atherosclerosis in the general population, but this association is largely explained by shared cardiovascular risk factors and lacks evidence of a causal relationship.
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