The Claim
Genetically predicted smoking behavior mediates 6% (95% CI: −20% to 32%) of the increased coronary artery disease risk associated with higher body mass index, indicating that smoking does not constitute a major mediating pathway in the relationship between obesity and coronary artery disease.
What the research says
Not yet evaluated
We are still looking at what the research says.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Genetic evidence shows that smoking explains only a small portion of why higher body mass index is linked to coronary artery disease, meaning most of the increased heart disease risk from obesity does not come through smoking.
See the scientific wording
Smoking behavior, as genetically predicted, mediates only 6% (95% CI: −20% to 32%) of the increased coronary artery disease risk from higher BMI, indicating that smoking is not a major pathway through which obesity contributes to heart disease.
Excess fat tissue releases chemicals that irritate blood vessels, causing them to become damaged and sticky, which allows cholesterol to build up inside artery walls and harden over time, leading to blocked arteries.
What the research says
1 studyThe study found that smoking only explains a tiny part (6%) of why being overweight increases heart disease risk — so it’s not a big reason why obesity harms the heart.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.