a general agreement or shared understanding reached by a group of people through mutual discussion, collaboration, and compromise. It involves integrating diverse viewpoints to arrive at a decision that reflects the collective judgment of all participants. At OMERACT, consensus is central to its methodology and one of the 8 Cs in the Spirit of OMERACT
Example
During the development of a new Core Domain Set at OMERACT, a working group uses the Delphi method to gather feedback from Patient Research Partners, clinicians, researchers, and policymakers. After several rounds of rating candidate domains and reviewing aggregated feedback, 75% of participants agree that “Fatigue” should be included as a core domain. This agreement meets the predefined consensus threshold, and the domain is formally added to the Core Domain Set.