Age
75 percent of all prostate cancers are diagnosed in men over 65. Simply growing older increases the likelihood of getting prostate cancer. The fastest growing group of men diagnosed with prostate cancer is the 50-to-60 age group.

Race
African-American men have the world's highest incidence of prostate cancer--one-third higher than white Americans. Asian men have much lower rates.

Genetics
If three relatives have the disease, you are 10 times more likely to get prostate cancer. If your father or your brother has prostate cancer, you are two to three times more likely to develop prostate cancer.

Dietary fat
International studies suggest that dietary fat may also be a risk factor.