Breast Cancer Risk Factors Table
The table below shows the relative risk of breast cancer for many factors. The relative risk compares the risk of breast cancer for people who have the factor to those who do not.
Factors are grouped based on the strength of the scientific evidence for each risk.
- Established and probable have the strongest evidence behind them and are recognized as linked (or not linked in some cases) to breast cancer.
- Possible factors have less evidence behind them; they suggest links to breast cancer but need more study before solid conclusions can be made.
- Insufficient or inconsistent factors are backed by few studies or the studies to date show very mixed results, which don't allow comment on any potential link with breast cancer.
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