Table 1.

Consensus classification

Consensus classification	Description	Definition
Consensus in	Consensus that outcome should be included in the core outcome set	70% or more participants scoring as 7 to 9 AND < 15% participants scoring as 1 to 3
Consensus out	Consensus that outcome should not be included in the core outcome set	70% or more participants scoring as 1 to 3 AND < 15% of participants scoring as 7 to 9
Neither consensus in nor out (no consensus)	Uncertainty about importance of outcome so retain for next round	Anything else