Research
Adherence
The 'obesity paradox' in heart failure—where overweight/obese patients have better short-term outcomes than normal-weight patients—is likely confounded by unintentional weight loss from underlying diseases (like cancer) and lead-time bias, rather than being a true protective effect of obesity.
Do not rely on the 'obesity paradox' to avoid weight management. The idea that being overweight helps heart failure is likely a statistical error caused by sick people losing weight unintentionally. Intentional weight loss is associated with better clinical outcomes.
GoodRefutesMEDIUM confidence
most studies on the subject were retrospective and observational, with limited to no differentiation between intentional and unintentional weight loss. Unintentional weight loss may reflect undiagnosed disease such as cancer and act as a significant confounder... the obesity paradox could be due to the potential confounding effect of lead time bias
Why this rating
Based on expert panel interpretation of retrospective and observational studies.
Source
A Saudi Heart Association Position Statement on Obesity and Cardiovascular Disease
Waleed AlHabeeb et al. · Journal of the Saudi Heart Association · 2024
DOI 10.37616/2212-5043.1391
clinical_guidelineCited 2×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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- Obesity is a major independent risk factor for the development of coronary artery disease, heart failure, atrial fibrillation, and sudden cardiac death, with risk increasing linearly with BMI and visceral adiposity.Strong
- Intentional weight loss of 10% or more significantly improves cardiovascular outcomes, including arrhythmic free survival and symptom severity in atrial fibrillation, whereas lesser degrees of weight loss (e.g., 5%) do not show the same benefit.Good
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