Toward greater representation
Dr. Yew pointed out that the study was limited by a few factors: neither the Eczema Area and Severity Index or Scoring of Atopic Dermatitis index data was used, and the study population was small and not representative of the real world.
Still, the new findings contribute to the overall safety and efficacy profile of JAK inhibitors in AD, which has so far been scarce in non-White populations.
“In Western studies, unfortunately, the representation of the population of skin of color or different ethnicities is underrepresented,” said Yousef Binamer, MD, chair of the dermatology department at King Faisal Specialist Hospital, Riyadh, Saudi Arabia, when approached for an independent comment on the results.
“This is now why researchers are looking into specific groups to study them,” which he pointed out, is crucial because “the immunophenotyping of AD is different for each background.”
The incidence and severity of AD tend to be higher in Asian and Middle Eastern populations, for instance, he noted. “It’s very common in Asia, and not so common in very white skin. I did my training in Canada so I see the difference,” said Dr. Binamer. “Asian people tend to be more itchy and have a tendency to scar on pigmentation.” Whereas White people “usually do not have this issue.”
“So I think real-world evidence of JAK inhibitors in the other populations is important,” he said. Studies such as the one conducted in Singapore, as well as the recently reported QUARTZ3 study, which examined the use of the JAK inhibitor ivarmacitinib in 256 Chinese patients with AD, are helping to pave the way.
The study was independently supported. Dr. Yew and Dr. Binamer have reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.