The Importance of Including Underserved Populations in Research.

This paper provides an overview of the ethical considerations surrounding the inclusion of underserved populations in later-phase clinical trials. Underserved populations, defined here as those with restricted access to or limited benefits from healthcare, often face systemic, logistical, and social barriers that limit their participation in research. This results in a lack of representation that undermines fairness in research and also hampers the development of effective inclusive healthcare practices. This paper argues that including underserved populations in research is crucial for promoting justice, increasing the generalizability of research findings, and building trust in medical institutions. It differentiates underserved populations from other populations of interest, including vulnerable, minority, and underrepresented groups. It then explores barriers to research participation and targeted solutions for four underserved populations: rural residents, racial and ethnic minorities, low-income individuals, and older adults. Strategies for improving participation include expanding trial sites to accessible locations, lowering financial and logistical barriers, broadening eligibility criteria, and fostering culturally tailored outreach and engagement. While some interventions may apply broadly across groups, effective solutions will often require intersectional and context-specific strategies tailored to each population's unique needs as well as coordinated efforts from multiple stakeholders. While these interventions alone cannot resolve healthcare inequities - as underrepresentation of underserved populations in research is just one contributing factor - their widespread implementation would represent meaningful steps toward advancing health equity.