Table 1. Classifications of peripheral arterial disease by clinical symptoms.

Fontaine classification		Rutherford classification
Stage	Clinical symptoms	Stage	Category	Clinical symptoms
I	Asymptomatic	0	0	Asymptomatic
IIa	Mild claudication	I	1	Mild claudication
IIb	Moderate to severe claudication	I	2	Moderate claudication
III	Ischemic rest pain	I	3	Severe claudication
IV	Ulceration or gangrene	II	4	Ischemic rest pain
		III	5	Minor tissue loss
		IV	6	Major tissue loss

Adapted from Korea National Diabetes Program, Clinical practice guideline for diabetic peripheral arterial disease [8].