Clinical and ultrasonographic features preceding a difficult-to-treat phenotype in psoriatic arthritis: a retrospective real-world exploratory cohort study
Objectives To explore clinical and ultrasonographic features preceding the development of a difficult-to-treat (D2T) phenotype in a real-world cohort of patients with psoriatic arthritis (PsA). Materials and methods In this retrospective cohort study, consecutive PsA patients (January 2020-September 2024) were included...