Table 2.

GLASS stages based on FP and IP grade.

	Infrainguinal GLASS Stage
FP Grade	4	III	III	III	III	III
	3	II	II	II	III	III
	2	I	II	II	II	III
	1	I	I	II	II	III
	0	NA	I	I	II	III
		0	1	2	3	4
	IP Grade

FP = femoropopliteal, IP = infra-popliteal.