Palliative Care Clinical Trials in Underrepresented Ethnic and Racial Minorities: A Narrative Review

Introduction: A growing number of patients with serious illness who would benefit from palliative care are part of ethnoracial minority groups. Nevertheless, large disparities in provision of palliative services exist for minoritized populations. Furthermore, there is a relative dearth of palliative care research focused on minority groups and how best to provide high-quality, culturally tailored palliative care. The aim of this narrative review is to summarize the existing literature regarding palliative care clinical trials in underrepresented minority populations, describe methodological approaches, and provide guidance on future palliative care-focused clinical trials. Methods: We used the Scale for the Assessment of Narrative Review Articles (SANRA) and Cochrane's guidelines on conducting reviews. We used PubMed and Clinicaltrials.gov to review published, full-text articles or protocols (1950-2022), and limited to palliative care interventions focused on ethnoracial minority populations. We included randomized clinical trials (RCTs), including pilot and feasibility trials, protocols of RCTs, and studies that report RCT methodology. Two reviewers independently assessed eligibility. Results: Our search yielded 585 publications; of these, 30 met the full-text review criteria and 16 studies met our criteria for inclusion. We deemed nine articles as having low risk of bias and four as having high risk of bias. Discussion: Commonly used methodologic approaches for clinical trials in underrepresented minority populations included the following: the use of written and visual materials that were no higher than a sixth-grade reading level, the use of patient and lay health navigators, bilingual and multicultural study staff and study materials, race-concordant staff, the option of in-person and virtual visits that accommodated the patient and family's schedule, recruitment from faith communities, and the use of community-engaged research principles. Future palliative care clinical trials should expand on the strategies described in this article, adopt effective strategies currently used in nonpalliative care interventions, and innovate around the principles of community-engaged research.