RT Journal Article SR Electronic T1 Defining Outcome Measures for Psoriatic Arthritis: A Report from the GRAPPA-OMERACT Working Group JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 697 OP 700 DO 10.3899/jrheum.170150 VO 44 IS 5 A1 Ogdie, Alexis A1 de Wit, Maarten A1 Callis Duffin, Kristina A1 Campbell, Willemina A1 Chau, Jeffrey A1 Coates, Laura C. A1 Eder, Lihi A1 Elmamoun, Musaab A1 FitzGerald, Oliver A1 Gladman, Dafna D. A1 Goel, Niti A1 James, Jana A1 Kalyoncu, Umut A1 Latella, John A1 Lindsay, Chris A1 Mease, Philip J. A1 O’Sullivan, Denis A1 Steinkoenig, Ingrid A1 Strand, Vibeke A1 Tillett, William A1 Orbai, Ana-Maria YR 2017 UL http://www.jrheum.org/content/44/5/697.abstract AB The Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA)-Outcome Measures in Rheumatology (OMERACT) Psoriatic Arthritis (PsA) Core Set working group recently published the updated 2016 psoriatic arthritis (PsA) core domain set, a set of disease features that should be measured in all clinical trials. At the GRAPPA annual meeting in July 2016, the PsA working group presented the updated PsA core domain set endorsed by 90% of participants at OMERACT in May 2016 and drafted a roadmap for the development of the PsA core outcome measurement set. In this manuscript, we review the development process of the PsA core domain set and the ongoing and proposed work streams for development of a PsA core measurement set.