sipuleucel-T: Each dose of sipuleucel-T contains a minimum of 50 million autologous CD54+ cells activated with PAP-GM-CSF. The recommended course of therapy for sipuleucel-T is 3 complete doses, given at approximately 2-week intervals.

ECOG Performance Status is a method used to assess the functional status of a patient. The scale ranges from 0-5. 0=Fully active, able to carry on all pre-disease performance without restriction; 1=Restricted in physically strenuous activity but ambulatory and able to carry out light or sedentary work; 2=Ambulatory, capable of all self-care but unable to carry out work activities. Up and about >50% of waking hour; 3=Capable of limited self-care, confined to bed or chair >50% of waking hours; 4=Completely disabled. Cannot carry on any self-care. Totally confined to bed or chair; 5=Dead

Gleason score= prostate cancer grading system based on how tissue looks under a microscope. Scores range 2-10 and indicates how likely it is that a tumor will spread. A low score means the cancer tissue is similar to normal tissue and the tumor is less likely to spread. Gleason Score ≤ 6=the tumor is well differentiated, less aggressive and likely to grow more slowly;7=the tumor is moderately differentiated, moderately aggressive, and likely to grow but may not spread quickly;≥8=the tumor is poorly differentiated or undifferentiated, highly aggressive, and likely to grow faster and spread.

Gleason score= prostate cancer grading system based on how tissue looks under a microscope. Scores range 2-10 and indicates how likely it is that a tumor will spread. A low score means the cancer tissue is similar to normal tissue and the tumor is less likely to spread. Gleason Score ≤ 6=the tumor is well differentiated, less aggressive and likely to grow more slowly;7=the tumor is moderately differentiated, moderately aggressive, and likely to grow but may not spread quickly;≥8=the tumor is poorly differentiated or undifferentiated, highly aggressive, and likely to grow faster and spread.

The NCI Comorbidity Index was used for this study. It is a weighted index to predict risk of death within 1 year of hospitalization for patients with specific comorbid conditions. Nineteen conditions were included in the index. Each condition was assigned a weight from 1 to 6, based on the estimated 1-year mortality hazard ratio from a Cox proportional hazards model. These weights were summed and for this study, a score of 0-1 was classified as a LOW score and a score great than 2 was classified as a HIGH score.

sipuleucel-T: Each dose of sipuleucel-T contains a minimum of 50 million autologous CD54+ cells activated with PAP-GM-CSF. The recommended course of therapy for sipuleucel-T is 3 complete doses, given at approximately 2-week intervals.