Two habits, two diseases, one big opportunity. A new global study found that alcohol and smoking are the top shared risk factors for both breast cancer and atrial fibrillation (AFib). Cutting these habits down to their safest levels could prevent nearly one-third of breast cancer cases and about 12% of AFib cases worldwide.
Two habits, two diseases, one big opportunity. A new study published in the Journal of the American Heart Association used global data and machine learning to identify the strongest shared risk factors between breast cancer and atrial fibrillation (AFib) — and the culprits are familiar: alcohol and smoking. Researchers analyzed data from over 204 countries using the Global Burden of Disease 2021 database, focusing on adults aged 55 and older.
The findings revealed that Western regions — including Europe, North America, and Oceania — had the highest rates of both conditions, while Southern and Eastern regions fared better. High BMI and low physical activity were also flagged as breast cancer-specific risk factors. Notably, this is the first study to combine global data with machine learning to map the geographic overlap and shared risk factors of these two conditions.
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Why it matters: Breast cancer and AFib are often treated as entirely separate conditions, but this research shows they share modifiable lifestyle risk factors. For clinicians, this opens the door to unified prevention strategies — tackling smoking and alcohol use could meaningfully reduce the burden of both diseases simultaneously.
