This study created a cohort of prostate cancer patients who are well characterized with respect to histology, stage of diagnosis, and (over time) mortality. This study is generating data regarding the length of the CAG repeat sequence occurring in the androgen receptor gene and major prostate cancer prognostic determinants (histologic grade and state) at the time of diagnosis in black and white veterans. CAG repeat lengths on the androgen receptor gene were evaluated for a cohort of 145 African American and 150 white veterans with prostate cancer.