RT Journal Article SR Electronic T1 Development of the autoinflammatory disease damage index (ADDI) JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 821 OP 830 DO 10.1136/annrheumdis-2016-210092 VO 76 IS 5 A1 Nienke M ter Haar A1 Kim V Annink A1 Sulaiman M Al-Mayouf A1 Gayane Amaryan A1 Jordi Anton A1 Karyl S Barron A1 Susanne M Benseler A1 Paul A Brogan A1 Luca Cantarini A1 Marco Cattalini A1 Alexis-Virgil Cochino A1 Fabrizio De Benedetti A1 Fatma Dedeoglu A1 Adriana A De Jesus A1 Ornella Della Casa Alberighi A1 Erkan Demirkaya A1 Pavla Dolezalova A1 Karen L Durrant A1 Giovanna Fabio A1 Romina Gallizzi A1 Raphaela Goldbach-Mansky A1 Eric Hachulla A1 Veronique Hentgen A1 Troels Herlin A1 Michaël Hofer A1 Hal M Hoffman A1 Antonella Insalaco A1 Annette F Jansson A1 Tilmann Kallinich A1 Isabelle Koné-Paut A1 Anna Kozlova A1 Jasmin B Kuemmerle-Deschner A1 Helen J Lachmann A1 Ronald M Laxer A1 Alberto Martini A1 Susan Nielsen A1 Irina Nikishina A1 Amanda K Ombrello A1 Seza Ozen A1 Efimia Papadopoulou-Alataki A1 Pierre Quartier A1 Donato Rigante A1 Ricardo Russo A1 Anna Simon A1 Maria Trachana A1 Yosef Uziel A1 Angelo Ravelli A1 Marco Gattorno A1 Joost Frenkel YR 2017 UL http://ard.bmj.com/content/76/5/821.abstract AB Objectives Autoinflammatory diseases cause systemic inflammation that can result in damage to multiple organs. A validated instrument is essential to quantify damage in individual patients and to compare disease outcomes in clinical studies. Currently, there is no such tool. Our objective was to develop a common autoinflammatory disease damage index (ADDI) for familial Mediterranean fever, cryopyrin-associated periodic syndromes, tumour necrosis factor receptor-associated periodic fever syndrome and mevalonate kinase deficiency.Methods We developed the ADDI by consensus building. The top 40 enrollers of patients in the Eurofever Registry and 9 experts from the Americas participated in multiple rounds of online surveys to select items and definitions. Further, 22 (parents of) patients rated damage items and suggested new items. A consensus meeting was held to refine the items and definitions, which were then formally weighted in a scoring system derived using decision-making software, known as 1000minds.Results More than 80% of the experts and patients completed the online surveys. The preliminary ADDI contains 18 items, categorised in the following eight organ systems: reproductive, renal/amyloidosis, developmental, serosal, neurological, ears, ocular and musculoskeletal damage. The categories renal/amyloidosis and neurological damage were assigned the highest number of points, serosal damage the lowest number of points. The involvement of (parents of) patients resulted in the inclusion of, for example, chronic musculoskeletal pain.Conclusions An instrument to measure damage caused by autoinflammatory diseases is developed based on consensus building. Patients fulfilled a significant role in this process.