Atopic dermatitis carried nearly fourfold higher psoriasis risk in a huge cohort
In about 300,000 matched pairs, atopic dermatitis was linked to a 3.8-fold higher risk of later psoriasis, yet biologics were linked to lower risk than conventional immunosuppressants.
Atopic dermatitis and psoriasis are often viewed as opposite ends of the immune spectrum, and evidence on whether one leads to the other has been conflicting. This preregistered cohort study used propensity score matching to compare people with atopic dermatitis against matched controls, with roughly 300,000 pairs in each comparison.
Atopic dermatitis was associated with a hazard ratio of 3.81 for incident psoriasis, a result that held across all eight sensitivity analyses and a Cox regression model.
The team also asked whether treatment changes that risk, given reports that type 2-targeted biologics might unmask psoriasis. Compared with conventional systemic immunosuppressants, biologics were associated with a lower psoriasis risk (HR 0.20). Control outcomes behaved as expected.
This is observational, so it shows associations, not causation. The authors note residual confounding and possible coding misclassification as limitations.
Summary prepared with AI assistance from the published abstract and reviewed by a physician. Not medical advice. Learn more
