Table 1.

Cellulitis severity classificationa

	Eron/CREST classification	Modified ‘Dundee’ classification
Class I	No or well-controlled comorbidities, systemically well	No sepsis, no comorbidities and SEWS <4
Class II	Systemically unwell with no uncontrolled comorbidities (eg obesity, peripheral vascular disease or venous insufficiency) or systemically well with poorly controlled comorbidities, which may delay their recovery	Documentation of one or more significant comorbidities (eg obesity, peripheral vascular disease or venous insufficiency), no sepsis, SEWS <4
Class III	Marked systemic inflammatory response (altered mental status, tachypnoea, tachycardia, hypotension etc) or may have very poorly controlled comorbidities which may affect their response to treatment or have a limb-threatening infection due to vascular compromise	Sepsis but SEWS <4
Class IV	Septic shock or life threatening presentations such as necrotising fasciitis requiring urgent critical care and surgical input	Sepsis and SEWS ≥4

^aLeft-hand column adapted from reference 16, right-hand column adapted from reference 17. CREST = Clinical Resource Efficiency Support Team; SEWS = Standardised Early Warning Score