September 8th, 2022

Across multiple demographics, accommodations boost patient interest in clinical trial participation and barriers lower interest.

Minority populations are significantly underrepresented in clinical research. When comparing the FDA’s recent Drug Trial Snapshots data with US Census data, women, white patients, and older patients are shown to be overrepresented in clinical trials. Black patients make up just 8% and Hispanic patients 11% of trial participants — much lower than their general population representation of 13% and 19%, respectively.

To further understand this disparity, SubjectWell fielded a survey in August 2022 of 423 patients, looking specifically at how common barriers to participation in clinical trials impact patients’ interest. The survey included a representative participant pool of both patients of color and white patients, 55% and 45% respectively. The results revealed that both patient populations were likely to participate in a clinical trial, with 70% of patients of color likely and 76% of white patients being likely to participate. While barriers create friction for participation in all populations, what accommodations should our industry consider to improve representation?

Simple accommodations boost clinical trial participation likelihood for all patients.

Across the board, the survey found a boost in patients’ likelihood to participate in a clinical trial when certain accommodations were offered, when compared to baseline participation responses (70% for patients of color and 76% for white patients). The responses did not differ significantly between patients of color and white patients, suggesting that accommodations can create interest for patients of color as well as for white patients.

Increased likelihood of patient participation when:

  • Patients of Color
  • White Patients

Receiving financial compensation

85% Patients of Color vs 88% White Patients


Receiving free healthcare related to their condition


Being able to complete a trial entirely from home (using a smartphone and receiving medication by mail)


Barriers lead to lower levels of interest in both white patients and patients of color.

When presented with barriers to participation, there were lower levels of interest for both patients of color and white patients. However, certain barriers affected patients of color more than white patients, including taking time off work and paying for expenses related to trial participation.

Respondents would be very unlikely to consider a clinical trial if they needed to:

  • Patients of Color
  • White Patients

Take two hours off work once per month to participate

22% Patients of Color vs 13% White Patients


Pay for expenses like transportation, parking, and lunch to participate


Household income does not significantly impact patients’ interest in clinical research.

Given that the survey identified patient compensation as a significant motivator and self payment of participation expenses as a significant barrier, we looked for a correlation between patients with lower incomes and impact on interest in participating in a clinical trial. However, despite financial factors being both highly motivating and providing clear challenges, the survey data showed that there was no major difference in interest in clinical trial participation across income brackets. Even when considering factors like race and perceived cost of living, patients showed similar amounts of interest regardless of income.

Accommodations for all patients, including free treatment and study compensation, increase interest in clinical trial participation – particularly for patients of color. But as patient-centric changes increase interest for all patients, this doesn’t adequately explain the underrepresentation in our industry. And the reasons why common barriers have greater impact on patients of colors’ decisions are still unclear, as this survey demonstrated household income does not directly affect interest, despite compensation as a strong motivator. Further research needs to be performed to address this lack of representation directly. In the meantime, industry professionals should highlight the benefits that underrepresented populations value most (like patient compensation) when considering clinical research participation in order to enroll more diverse patient populations.

Have any questions about our marketplace? Reach out by emailing sales@subjectwell.com.