Companies are working to develop new vaccines for COVID-19, and one of the many challenges is ensuring that clinical trials required to test the new medicines reflect the population at large in order to determine how effective the vaccines will be when offered to tens of millions of people throughout the United States.
In this Q&A, Lynne D. Richardson, MD, Professor and Vice Chair of Emergency Medicine, Professor of Population Health Science and Policy, and Co-Director of Mount Sinai’s Institute for Health Equity Research, talks about the latest COVID-19 vaccines, why it is important for clinical trials to include a diverse population, and how well the pharmaceutical industry has done that.
Based on data you have seen about the most advanced COVID-19 vaccines in development, do you think the pharmaceutical companies have done a good job including a diverse group of people in their clinical trials?
They are all committed to trying to include a diverse population into their trials. I think there have been substantial efforts to improve the diversity of the participants in the vaccine trials. From the data I’ve seen, I think they did an okay job, though ideally, the makeup of the folks in the trials would be the same as the distribution of the disease.
Why is it important to have a diverse group of people in the clinical trials for COVID-19 vaccines?
Trials are a way of getting information about how something works. So if you want to know that it works for people of all ages, people of all races, people of all ethnicities, people who have lots of other medical conditions, these people must be in the trial. This is always true, not just for vaccines. In addition, participation in the trials must be representative of the population that is suffering from whatever condition is being targeted by the vaccine, or the treatment. There are certain communities, specifically Black and Hispanic communities, who we know are being harder hit by COVID-19, both in the chance they contract COVID-19, and the severity of the disease if they do get it. That’s why it’s important to have a vaccine that is safe and effective for those communities.
Lynne D. Richardson, MD
In the past, how well have clinical trials included a diverse population, including people of color and those of different socio economic status?
If you go back 40 or 50 years, clinical trials consisted almost exclusively of white men between the ages of 25 and 65. They were considered the ideal subjects. The problem is, it is very hard to extrapolate the results and findings of the trial to types of people who are not participating in the trial. It was about 30 years ago that a big push to improve the gender diversity in clinical trials came with the establishment of an Office of Women’s Health at the National Institutes of Health, and that’s when the federal agencies that sponsored research started paying attention to who actually was participating in trials. It was about a decade later that significant attention to the racial and ethnic diversity in trial participation emerged. So it’s not a new issue. The degree of under-representation even a decade ago was staggering. About five percent of clinical trial participants were Black at a time when Black people accounted for 12 percent of the population. About one percent were Hispanic at a time when Hispanics were 16 percent of the population.
Why has ethnic and racial representation been so poor?
For patients, there is a legacy of mistrust of research, certainly among the African American population, but also mistrust of the health care system in general and of research, specifically among many disadvantaged populations. They are skeptical about the motives and intent of researchers. Also, there are access issues. Most clinical trial participants are recruited through their physicians, and often companies did not include physicians and practices that serve diverse patient populations.
What can be done about that?
Project Impact of the National Medical Association, a national association of Black physicians, has been working to diversify participation in clinical trials for more than a decade by speaking with Black physicians, who often have a group of patients that is much more diverse. They have published results that show that when Black people are approached in the same way, when they are encouraged to participate by a physician with whom they have a relationship, and whom they trust, they participate at the same rates as other groups. But you have to reach out to the physician and the physician practices, where they have those sorts of relationships.
How has the situation changed during the pandemic?
In the era of the COVID-19 pandemic, with Black people and Hispanics being disproportionately impacted by the virus, it’s essential to engage them in vaccine trials. Yet the level of public distrust in the research process and government has never been higher. So we have a lot of work to do if we’re going to get this pandemic under control. Building trust means developing relationships and that takes time. This is an ongoing challenge in some of the trials and is why Mount Sinai has been approached by many of the pharmaceutical companies because we do have access to this diverse population.
What is Mount Sinai doing?
At the Mount Sinai Institute for Health Equity Research, we have been approached by various entities, asking us to help recruit more diverse populations into their studies. We start by talking about the things you have to do. First, you have to talk with some of our community partners and you have to accept their input, such as the language you use in the materials you distribute to participants. You need to look at how burdensome the trial will be. If we are going to combat mistrust, we must behave in a trustworthy manner. The Institute is ready to work with researchers who are serious about building the relationships needed to recruit diverse populations into clinical trials.