Workgroup Leaders

  • Alice Gottlieb, MD, PhD
  • Joseph Merola, MD, MMSC
  • Lourdes Perez-Chada, MD, MMSc
  • Philip Mease, MD
  • Alexis Ogdie, MD, MSCE
  • Lihi Eder, MD, PhD
  • Vibeke Strand, MD

Psoriatic arthritis is a form of arthritis that affects some people who have psoriasis - a condition that features red patches of skin topped with silvery scales. Most people develop psoriasis first and are later diagnosed with psoriatic arthritis, but the joint problems can sometimes begin before skin patches appear.

Joint pain, stiffness and swelling are the main signs and symptoms of psoriatic arthritis. They can affect any part of your body, including your fingertips and spine, and can range from relatively mild to severe. In both psoriasis and psoriatic arthritis, disease flares may alternate with periods of remission.

Psoriatic Arthritis Core Set


From Gladman DD, Mease PJ, Strand V, et al.
Consensus for psoriatic arthritis. J Rheumatol. 2007 May; 34(5):1167-70

View complete slides

Core of Domain

Outcome Measures

PsA Symptoms PsAID9 (Alternatively: RAPID3)
Treatment Satisfaction New instrument under development


1. Joseph F. Merola, David A. Amato, Kyoungah See, Russel Burge, Craig Mallinckrodt, Clement K Ojeh, Alice Gottlieb: Evaluation of sPGAxBSA as an outcome measure and treatment target for clinical practice. J. Invest. Dermatol. J Invest Dermatol. 2018 Mar 22. pii: S0022-202X(18)31741-X. doi: 10.1016/j.jid.2018.01.041. [Epub ahead of print]; 138:1955-1961. 2018. Read...

2. Perez-Chada LM, Cohen JM, Gottlieb AB, Duffin KC, Garg A, Latella J, Armstrong AW, Ogdie A, Merola JF. Achieving international consensus on the assessment of psoriatic arthritis in psoriasis clinical trials: an International Dermatology Outcome Measures (IDEOM) initiative. Archives of dermatological research. 2018 Aug 25:1-0. Read...