An evidence-based conceptual framework and process to guide decisions in the development of a core outcome measurement set. Consists of the process of identifying both what to measure and how to measure. For instrument selection assesses truth (face, content, construct and criterion validity), discrimination (reliability and sensitivity to change) and feasibility . If an outcome measurement instrument, or instrument (outcome measure / questionnaire/scale) passes these tests it is valid for use.
OMERACT Filter 2.2, TDF, Filter