Abstract A084: The forgotten race: Under-representation of Asians in clinical research

The United States (US) is racially and culturally diverse. Still, white women disproportionately comprise clinical trial participants, stemming largely from the fact that minorities often decline participation. Clinical trial findings, therefore, have not been representative of the diverse patient population, and have stymied progress in precision medicine and cancer prevention. According to the CDC, among Asian/Pacific Islander females, the leading cause of death is cancer. Moreover, they have more total cancer-related deaths than any other racial group. Per the 2017 US Census, Asians are the third largest minority group of the population (6.6%). Despite the grave health disparities faced by a sizable proportion of the population, the literature is sparse with regards to their research engagement. For example, several studies have focused on Black and Hispanic consenting rates, including one study that demonstrated no significant differences between the two groups (Wendler, Kington, Madans, Wye, Christ-Schmidt, Pratt et al., 2005) and another that indicated relatively lower enrollment rates among Hispanics and Blacks (Murthy, Krumholz, Gross, 2004). This gap in research is largely due to the marked heterogeneity with respect to language, nationality, and acculturation status. We examined Asian participation in three therapeutic, noninterventional trials that aim to develop early detection methods and accurate prognosis in women at high risk for breast cancer. Primarily, we collect leftover tissue and/or cells from fine needle aspirations (FNA) to better understand the cellular microenvironment that correlates with breast cancer development. We analyzed demographic data across these studies to investigate refusal rates among Asian women. Across the three trials, 3,119 participants were screened. Of the total number screened, 426 participants were eligible, 368 consented, and 58 declined. Of those who declined, 23.5% were Asians, 13.9% Hispanic, 8.3% Blacks, 5.6% Native Americans, and 11.4% White/non-Hispanic. Notably, Asians had the highest refusal rate. Fisher's exact test (two-tailed) was conducted to examine refusal rates for Asians compared to Whites, Blacks, and Hispanics. Results suggest that Asians had significantly higher rates of compared to Whites (p = .02, observed odds ratio = .42, 95% CI [.20, .86]), but were not significantly different than Blacks or Hispanics. The under-representation of Asians in research may exacerbate health disparities.