OMERACT Core outcome measurement set for shared decision making in rheumatic and musculoskeletal conditions: a scoping review to identify candidate instruments

•The OMERACT SDM Working Group aims to identify candidate instruments for a Core Outcome Measurement Set.•Our scoping review includes 99 articles reporting on 220 candidate instruments for SDM in RMDs.•We identified evidence gaps and inconsistent reporting of measured constructs and measurement properties.•Only approximately 10% of instruments matched with a criterion of our adapted Summary of Measurement Properties table.•Next steps include matching candidate instruments with Core Domains and assessing feasibility.