Classification of peripheral artery disease - McMaster Textbook of Internal Medicine

Table 3.19-5. Classification of peripheral artery disease
Fontaine classification stage	Symptoms		Rutherford classification stage
I	Asymptomatic		0
IIa	Claudication >200 meters	Mild claudication	1
IIb	Claudication <200 meters	Moderate claudication	2
IIb	Claudication <200 meters	Severe claudication	3
III	Rest pain		4
IV	Ischemic necrosis or ulceration	Minor tissue damagea	5
IV	Ischemic necrosis or ulceration	Major tissue damageb	6
a Nonhealing ulceration, focal gangrene with diffuse pedal ischemia. b Extending above the transmetatarsal level, functional foot no longer salvageable.
Adapted from Helv Chir Acta. 1954;21(5-6):499-533 and J Vasc Surg. 1997;26(3):517-38.