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Since many
studies show that dietary fat increases the risk of prostate cancer and since several
studies show that smokers are more likely to have a diet high in fat, the observed
association between smoking and prostate cancer may be due to uncontrolled confounding by
dietary fat – only 8 studies either adjusted for it or found no association between
dietary fat and prostate cancer. Smokers may receive less aggressive treatment for their
prostate cancer compared to non-smokers and this may have accounted for the higher
mortality. |