TABLE 1.

EN items reaching consensus

Item	Responses	Proportion agreement (%)
In a clinical practice setting, IBD-associated EN should be recognised by	Dermatologist	100
	An IBD specialist	100
IBD-associated EN should be clinically diagnosed by	Dermatologist	100
	An IBD specialist	94
IBD-associated EN should be defined in the clinical practice setting based on	Characteristic appearance of erythematous nodule(s) plus patient report of tenderness	100
	A lesion with features of septal panniculitis on biopsy if there is diagnostic uncertainty on physical exam	100
The average patient with IBD-associated EN can be monitored via	Visits to IBD specialist	88
	Visits to Dermatologist	88
The average patient with IBD-associated EN should be seen	At the time of scheduled assessment of IBD with mild disease and every 1–3 months for moderate to severe disease requiring active intervention	88
Appropriate ways to assess for improvement or worsening in IBD-associated EN include	Patient report of a change in size and/or number of nodules	88
	Patient global assessment	82
	Physician assessment demonstrating change in size	75–83a
	Physician assessment of change in the number of nodules	76–82a
	Physician global assessmentb	76–94a
Resolution of IBD-associated EN is defined as	Patient report of resolution	88
	Physician assessment demonstrating no nodule(s)	88
Recurrence of IBD-associated EN is defined as	Nodule(s) that develop anywhere	100
Timeline of recurrence of IBD-associated EN is defined as	Patient report of the nodule(s) returning any time after resolution	82
	Physician assessment of nodule(s) returning any time after resolution	88
Patients with IBD-associated EN should be monitored for recurrence	As part of standard of care visits with their IBD specialist	94
	As part of standard of care visits with dermatology	88

Abbreviations: EN, erythema nodosum; IBD, inflammatory bowel disease.

^aRange in percentage is due to the inclusion of percentage agreement for improvement and for worsening (see Table S2 for a breakdown of percentages by individual items).

^bPhysician global assessment was defined by our panel with 100% consensus as the overall status of EIM based on patient symptoms, physical exam, and any relevant testing (imaging, laboratory data).