Red Hat Group

The Red Hat Group (RHG) was formed at the COMET VII meeting in Amsterdam in 2018, and comprises several initiatives related to improving choice of outcomes in health research – COMET, OMERACT, CS-COUSIN, GRADE, CMTP, COSMIN, CDISC and SONG.


The initial objective is to work together on a project to share knowledge and understanding of mechanisms to promote uptake of COS in comparative effectiveness research.


Center for Medical Technology Policy (CMTP):
Cochrane Skin Core Outcome Set Initiative (CS-COUSIN):
Consensus-based Standards for the selection of health Measurement Instruments (COSMIN):
Clinical Data Interchange Standards Consortium (CDISC):
MacGRADE Centre, McMaster University:
Standardised Outcomes in Nephrology (SONG) Initiative:
Outcome Measures in Rheumatology (OMERACT):



"Health outcome descriptors" (27th January 2021)
Robby Nieuwlaat and Wojtek Wierchioch (MacGRADE Centre, McMaster University)


"Latest update to the OMERACT Filter for Instrument Selection (version 2.2)" (27th January 2021)
Dorcas Beaton (Institute for Work & Health, Toronto, Canada)


"An Introduction to CDISC standards and the Role of COS in the Development Process" (23rd March 2021)
John Owen (Clinical Data Interchange Standards Consortium, CDISC)


"A new and consistent SONG: a global initiative to standardise outcomes in nephrology" (24th March 2021)
Jonathan Craig (Flinders University); Allison Tong (University of Sydney)