Developing a composite outcome tool to measure response to treatment in ANCA-associated vasculitis: A mixed methods study from OMERACT 2020

The Outcome Measures in Rheumatology (OMERACT) Vasculitis Working Group aims to develop composite response criteria for ANCA-Associated Vasculitis (AAV).The project follows the OMERACT approach for composite measures: (i) choose relevant domains; (ii) define high-quality instruments; (iii) decide on a scoring system approach; (iv) put through the OMERACT Filter 2.1 for validation.A systematic literature review of outcome measures used in...