TY - JOUR T1 - Instrument Selection Using the OMERACT Filter 2.1: The OMERACT Methodology JF - The Journal of Rheumatology JO - J Rheumatol DO - 10.3899/jrheum.181218 SP - jrheum.181218 AU - Dorcas E. Beaton AU - Lara J. Maxwell AU - Beverley J. Shea AU - George A. Wells AU - Maarten Boers AU - Shawna Grosskleg AU - Clifton O. Bingham III AU - Philip G. Conaghan AU - Maria Antonietta D’Agostino AU - Maarten de Wit AU - Laure Gossec AU - Lyn M. March AU - Lee S. Simon AU - Jasvinder A. Singh AU - Vibeke Strand AU - Peter Tugwell Y1 - 2019/02/01 UR - http://www.jrheum.org/content/early/2019/01/23/jrheum.181218.abstract N2 - Objective Outcome Measures in Rheumatology (OMERACT) Filter 2.1 revised the process used for core outcome measurement set selection to add rigour and transparency in decision making. This paper describes OMERACT’s methodology for instrument selection. Methods We presented instrument selection processes, tools, and reporting templates at OMERACT 2018, introducing the concept of “3 pillars, 4 questions, 7 measurement properties, 1 answer”. Truth, Discrimination and Feasibility are the three original OMERACT pillars. Based on these, we developed four signaling questions. We introduced the Summary of Measurement Properties (SOMP) table which summarizes the seven measurement properties: Truth (domain match, construct validity), Discrimination (test-retest reliability, longitudinal construct validity (responsiveness), clinical trial discrimination, thresholds of meaning), and Feasibility. These properties address a set of standards which, when met, answer the one question: Is there enough evidence to support the use of this instrument in clinical research of the benefits and harms of treatments in the population and study setting described? The OMERACT Filter 2.1 was piloted on two instruments by the Psoriatic Arthritis Working Group Results The methodology was reviewed in a full plenary session and facilitated breakout groups. Tools to facilitate retention of the process (i.e., “The OMERACT Way”) were provided. The two instruments were presented and the recommendation of the working group was endorsed in the first OMERACT Filter 2.1 Instrument Selection votes. Conclusion Instrument Selection using OMERACT Filter 2.1 is feasible and is now being implemented. ER -