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At the 2017 annual meeting of the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA), the International Dermatology Outcome Measures (IDEOM) psoriasis working group presented an overview of its cutaneous domain of psoriatic arthritis (PsA) projects. First, the group presented an overview of IDEOM's work to establish psoriasis outcome measures that satisfy the needs of all those involved. Second, the group discussed replacements for the Psoriasis Area and Severity Index (PASI) that can be used in clinical practice, including data that support the use of the physician's global assessment × body surface area measurement score as a PASI surrogate. Third, the group discussed the contribution of skin disease to composite measures of PsA. Last, the group summarized the National Psoriasis Foundation's efforts to establish treat-to-target strategies for psoriasis care.

Original publication




Journal article


The Journal of rheumatology. Supplement

Publication Date





40 - 43


From the Department of Dermatology, New York Medical College, Metropolitan Hospital, New York, New York; Department of Dermatology, Keck School of Medicine, University of Southern California, Los Angeles, California; Department of Dermatology, Harvard Medical School, Brigham and Women's Hospital, Boston, Massachusetts, USA; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds; Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK; Department of Clinical Immunology and Rheumatology, Amsterdam Rheumatology and Immunology Center, Academic Medical Center/University of Amsterdam, Amsterdam, the Netherlands.