RT Journal Article SR Electronic T1 Systematic Review of Treatment Effectiveness and Outcome Measures for Enthesitis in Psoriatic Arthritis JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 2290 OP 2294 DO 10.3899/jrheum.140878 VO 41 IS 11 A1 Ana-Maria Orbai A1 Joshua Weitz A1 Evan L. Siegel A1 Stefan Siebert A1 Laura J. Savage A1 Sibel Z. Aydin A1 Jolanda J. Luime A1 Ori Elkayam A1 Barbara Neerinckx A1 Slavo Urbancek A1 Kurt de Vlam A1 Christopher T. Ritchlin A1 the GRAPPA Enthesitis Working Group YR 2014 UL http://www.jrheum.org/content/41/11/2290.abstract AB Enthesitis is a characteristic feature of psoriatic arthritis (PsA) and is important in disease pathogenesis and classification. Use of clinical outcome measures for enthesitis is heterogeneous, and only 1 measure has been specifically developed and validated in PsA. Ultrasound and magnetic resonance imaging assessments of enthesitis may have advantages over clinical examination but are insufficiently studied. As part of an update of treatment recommendations by the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA), we performed a systematic literature review and identified randomized controlled trials with enthesitis outcomes in PsA. For each treatment agent we calculated treatment effect sizes (where applicable) and graded the level of evidence.