Table 1

Definition of consensus for each stage of the study (defined a priori)

Consensus classification	Description	Definition of consensus
Consensus classification	Description	Healthcare professionals’ Delphi	Patient/parent survey	Consensus meeting*
Consensus in	Consensus that outcome should be included in core set	≥70% of participants scoring ‘7–9’ ‘critical for decision-making’	≥70% of participants scoring ‘really important’	≥80% of participants voting for inclusion in core outcome set
Consensus out	Consensus that outcome should not be included in the core outcome set	≥70% of participants scoring ‘1–3’ ‘low importance’	≥70% of participants scoring ‘not that important’	<80% of participants voting for inclusion in core outcome set
Equivocal	Uncertainty about importance of outcome	All other responses	All other responses	Further discussion by NGT and re-voting allowed