NEW YORK — From clinical trials to textbooks, patients with darker skin types who have psoriasis overall — and Black patients in particular — are underrepresented, which might at least partially explain why clinicians are slow to recognize nail involvement, even when the skin disease has already been diagnosed, according to Shari R. Lipner, MD.
In a recently published review of 45 randomized controlled trials of therapies for nail psoriasis, almost all included information about the gender of the patients enrolled, but only about 35% reported race and/or ethnicity, Lipner, associate professor of dermatology, Weill Cornell Medical College, New York, said at the Skin of Color Update 2023. The proportion climbed to 59% in trials that included at least one study site in the United States, although representation of non-White patients in studies conducted in the United States was not proportional to the population (13.4% vs. 39.9%), said Lipner, senior author of the review.
Black Patients Largely Unrepresented in Photos
When an Internet search was conducted for images of nail psoriasis, the proportion of images fell as the number of the Fitzpatrick scale increased. Fitzpatrick skin types 1 or 2 represented 70% of the images, skin types 3 to 4 represented about 27%, leaving just 3% represented by darker skin types, Lipner said.
