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Study Finds Lack Of Racial Diversity In Cancer Drug Clinical Trials | NEWS-Line for Healthcare Professionals

Study Finds Lack Of Racial Diversity In Cancer Drug Clinical Trials


Source:

New research published this week in JAMA Oncology has found a lack of racial and ethnic diversity in clinical trials for cancer drugs.

The study — “Disparity of Race Reporting and Representation in Clinical Trials Leading to Cancer Drug Approvals From 2008 to 2018” — was conducted by researchers from the University of British Columbia, the University of Texas MD Anderson Cancer Center, the Fred Hutchinson Cancer Center in Seattle and Baylor University. It raises concerns about the effectiveness of cancer drugs in some patients, especially since genetic differences may affect how well a patient responds to a drug.

The researchers found that fewer than 8% of cancer drug trials reported participation from the four major races in the United States — white, Asian, black and Hispanic — between 2008 and 2018. Black and Hispanic patients were particularly underrepresented at 22% and 44%, respectively, considering their populations’ incidence of cancer.

“Our findings show that the science might not be applicable to the population that’s going to receive the medications,” said the study’s lead author, Dr. Jonathan Loree, assistant professor in UBC’s department of medicine, division of medical oncology, and a medical oncologist with BC Cancer Agency in Vancouver, Canada. “If patients are going to be receiving the drug, we need to know that it’s going to work for them with the same effectiveness that’s seen in the trial.”

Study co-author and Baylor junior biology major Anirudh Gothwal maintained the study database and took part in screening and reviewing articles analyzed in the study.

“Ethics and equality in medicine are things you really don’t see too many people talking about,” he said. “Being from India, where research is scanty, discovering that minority groups were being vastly underrepresented even in U.S. trials was disheartening. I think it is exceedingly important to shed light on the fact that health care truly is a right for everyone, regardless of their gender or race."

Loree and colleagues reviewed all reported trials supporting U.S. Food and Drug Administration (FDA) oncology drug approvals granted between July 2008 and June 2018. They scrutinized 230 trials with a total of 112,293 participants. They calculated the U.S. population-based cancer estimates by race using National Cancer Institute and U.S. Census data.

Loree cited an example of a medication used to treat lung cancer that showed mediocre trial results in the global population but exhibited incredible success with young women who had never smoked in a study in Asia. The difference was due to a genetic mutation common in that population.

Researchers found that reporting about race in trials and enrollment rates changed minimally over the decade.

Although the researchers used U.S. data, Loree said the findings also are relevant in Canada. Pharmaceutical companies typically apply for drug approvals through the FDA first, because it serves the largest market, and then submit to the European Medicines Agency and Health Canada. The researchers now are looking at whether clinical trials represent the same gender ratio as the general population to ensure the drugs are effective in all people.

Source:Baylor University

Photo Credit:iStockphoto




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