Impact of Asian American race on prostate cancer outcomes
5165 Background: The global increased incidence of prostate cancer (CaP) is of growing concern, notably in Asia where a 118% rise has been documented. Recent publications report that Asian Americans are more likely to have advanced clinical stage, higher tumor grades, and worse survival rates compared to other racial groups. It remains unclear if these adverse outcomes are attributable to intrinsic biologic differences of CaP in Asians or socioeconomic and cultural differences. Methods: Men registered into the Center for Prostate Disease Research multi-center military national database from 1989–2007 with biopsy-proven CaP and categorized as Asian American, Caucasian, or African American descent were included. Demographic and clinical characteristics were examined. Frequencies were reported for categorical features. Measures of central tendency and dispersion were reported for continuous features. Chi-square, ANOVA and Kruskal-Wallis test were used to examine association between race and clinico-pathologic features. Differences of PSA recurrence and overall survival rates were analyzed by Kaplan-Meier. The multi-variate Cox proportional hazard model was used to examine predictive value of clinico-pathologic features. Results: Included patients were 10,964: 583 (5.3%) Asian Americans, 2,046 (18.7%) African Americans, and 8,335 (76.0%) Caucasians. At diagnosis, Asian Americans had lower clinical stage (p<0.0001) but worse biopsy grade (p = 0.0006) than other groups. They had a higher percentage of organ confined disease (p < 0.0001) and were more likely to choose radical prostatectomy (RP) (p < 0.0001). Asian Americans had improved biochemical recurrence free (p<0.01) and overall survival (p < 0.001) compared to African Americans or Caucasians treated with RP or external beam radiation. Conclusions: Asian Americans with CaP treated in an equal access military health care system have improved pathologic outcomes and survival characteristics compared with other races. Asian ethnicity's negative impact on survival noted by others appears to be from factors other than the tumor's intrinsic behavior such as language barriers, socioeconomic status, and cultural norms. No significant financial relationships to disclose.