Prostate cancer early detection program recruitment methods and show rates in men at high risk.

PURPOSE: Men with a family history of prostate cancer and black men are at higher risk for prostate cancer. Recruitment and retention of these men at high risk into early detection programs is challenging. We report a comprehensive analysis of recruitment methods, show rates and participant factors from the Prostate Cancer Risk Assessment Program, a prospective, longitudinal prostate cancer screening study. MATERIALS AND METHODS: Men 35 to 69 years old were eligible for recruitment if they had a family history of prostate cancer, were black or had a BRCA1/2 mutation. Recruitment methods were analyzed using standard statistical methods with respect to participant demographics and presentation to the first program appointment. RESULTS: Of 707 men recruited 64.9% presented to the initial program appointment. More men were recruited via radio than via referral or other methods (chi-square = 298.13, p <0.0001). Men recruited by radio were more likely to be black (p <0.001), less educated (p = 0.003) and not married or partnered (p = 0.007), and have no prostate cancer family history (p <0.001). Men recruited by referral had a higher income (p = 0.007) and were more likely to attend the initial program visit than those recruited by radio or other methods (chi-square = 27.08, p <0.0001). CONCLUSIONS: This comprehensive analysis shows that radio led to higher recruitment of black men with lower socioeconomic status. However, these men at high risk have a lower presentation rate for prostate cancer screening. Targeted motivational measures must be studied to improve the show rate for prostate cancer risk assessment in these men at high risk.

Race, genetic West African ancestry, and prostate cancer prediction by prostate-specific antigen in prospectively screened high-risk men.

"Race-specific" prostate-specific antigen (PSA) needs evaluation in men at high risk for prostate cancer for optimizing early detection. Baseline PSA and longitudinal prediction for prostate cancer were examined by self-reported race and genetic West African (WA) ancestry in the Prostate Cancer Risk Assessment Program, a prospective high-risk cohort. Eligibility criteria were age 35 to 69 years, family history of prostate cancer, African American race, or BRCA1/2 mutations. Biopsies were done at low PSA values (<4.0 ng/mL). WA ancestry was discerned by genotyping 100 ancestry informative markers. Cox proportional hazards models evaluated baseline PSA, self-reported race, and genetic WA ancestry. Cox models were used for 3-year predictions for prostate cancer. Six hundred forty-six men (63% African American) were analyzed. Individual WA ancestry estimates varied widely among self-reported African American men. Race-specific differences in baseline PSA were not found by self-reported race or genetic WA ancestry. Among men with > or =1 follow-up visit (405 total, 54% African American), 3-year prediction for prostate cancer with a PSA of 1.5 to 4.0 ng/mL was higher in African American men with age in the model (P = 0.025) compared with European American men. Hazard ratios of PSA for prostate cancer were also higher by self-reported race (1.59 for African American versus 1.32 for European American, P = 0.04). There was a trend for increasing prediction for prostate cancer with increasing genetic WA ancestry. "Race-specific" PSA may need to be redefined as higher prediction for prostate cancer at any given PSA in African American men. Large-scale studies are needed to confirm if genetic WA ancestry explains these findings to make progress in personalizing prostate cancer early detection.