Global Investigative Site Personnel Diversity and Its Relationship with Study Participant Diversity

BACKGROUND: There is little to no empirical data on the race and ethnicity of the global community of professionals conducting clinical trials funded by pharmaceutical and biotechnology companies and little empirical evidence on the relationship between the race and ethnicity of investigative site personnel and the overall and corresponding diversity of participants enrolled. METHODS: A global online survey conducted in mid-2021 gathered responses from 3462 clinical research professionals representing approximately 3300 distinct investigative sites. RESULTS: Worldwide, including all research settings, the majority (64%) of investigative site personnel are White, 20% are LatinX, 6% are Black, 7% are Asian and 3% are other races and ethnicities (e.g., indigenous peoples, Pacific Islander, Middle Eastern, etc.). The representation of non-white site personnel is significantly higher in North America and Rest of World (ROW) compared to Europe. The highest levels of personnel diversity are found in private community-based practices, investigative sites and site networks. A significant correlation (p < 0.001) was found between site personnel diversity and patient enrollment diversity worldwide. As the mix of site personnel by race and ethnicity increases, the diversity of patients enrolled—except for Asian patients in sites outside of North America—also increases. A significant relationship was also found between the proportion of a given race or ethnicity of investigative site personnel and the corresponding race and ethnicity of patients enrolled. CONCLUSIONS: An opportunity exists to address under-representation in clinical trials through identifying, hiring and supporting investigative site personnel to best reflect the patient communities that they serve.