But risk factors don't tell us everything. Many people with one or more risk factors never get cancer, while others who get cancer may have had no known risk factors.
We don't yet completely understand the causes of prostate cancer, but researchers have found several factors that may change the risk of getting it. For some of these factors, the link to prostate cancer risk is not yet clear.
Age
Age is the strongest risk factor for prostate cancer. Prostate cancer is very rare before the age of 40, but the chance of having prostate cancer rises rapidly after age 50. Almost 2 out of 3 prostate cancers are found in men over the age of 65.
Race/ethnicity
Prostate cancer occurs more often in African-American men than in men of other races.
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