Objective: To provide an overview of commonly used outcome measure in psoriatic arthritis (PsA).Background: PsA is a heterogenous inflammatory arthritis, associated with psoriasis that affects between 0.1% and 2% of the population and approximately one in three patients with psoriasis. Psoriatic arthritis places a significant burden on patients' overall quality of life and is associated with a range of comorbidities. Although assessment of patients and monitoring of symptoms has greatly improved over the last 2 decades, capturing disease activity in this multisystem disease remains challenging. Previous efforts have traditionally focussed on assessment of individual disease domains, however recent evidence suggests that composite measurements, particularly those incorporating patient reported outcomes may not only help monitor disease activity more accurately, but also help in accurately validating therapy outcomes in PsA patients.Purpose: This review discusses currently used outcome measurements in PsA and also highlights the importance of emerging measurements such as biomarkers and their possible role in capturing treatment response. K E Y W O R D S outcomes measurements, PROM, psoriatic arthritis 1 | INTRODUCTION Psoriatic arthritis (PsA) is a heterogenous condition with musculoskeletal involvement, manifesting as a variety of symptoms including arthritis, dactylitis, enthesitis and axial involvement (Coates and Helliwell, 2017). In addition to musculoskeletal symptoms, patients with PsA have other symptoms such as nail disease, which affects between 63% and 83% of patients (Nieradko-Iwanicka, 2017). Along with the varied nature of symptoms, the repercussions on patients are equally as diverse. Patients with PsA have an increased risk of comorbidities such as cardiovascular disease, metabolic syndromes, depression, inflammatory bowel disease and anxiety. In order to measure the impact of PsA on patients, a range of outcomes measures have been developed to ascertain disease impact and help monitor response to treatment in both clinical trials and the realworld settings. Despite the development of a range of outcome measures for patients, agreement as to the exact measure that should be utilized remains a challenge. Recent recommendations from the TIght Control Of Psoriatic Arthritis (TICOPA) trial have highlighted the need and importance of regular assessment of disease activity by clinicians, as well as the critical role patients play in capturing their own concerns (Coates et al., 2015). To capture these outcome measurements, The Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA)-Outcome Measures in Rheumatoid Arthritis Clinical Trials (OMERACT) PsA working group developed a This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.