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. 2021 Aug 10;7(2):e001707. doi: 10.1136/rmdopen-2021-001707

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© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See: https://creativecommons.org/licenses/by/4.0/.

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Summary of quality and quantity of reported psychometric evidence of patient-reported outcome measures (based on the OMERACT filter). Validity: quantity of evidence (this must be separate papers providing appropriate supportive evidence). Discrimination: reliability is a requirement, and reflects the degree of discrimination available. Minimally Important Difference (MID)/Minimal Clinically Important Difference (MCID) and Standardised Response Mean (SRM) regarded as best quality for responsiveness. Feasibility: understandable and quick to complete from the patient perspective. Availability irrespective of resources.