Table II.

Society of Vascular Surgery/International Society of Cardiovascular Surgery clinical status grading scale.

+3	Markedly improved: No ischemia symptoms, and any foot lesions completely healed; ankle-brachial index essentially normalized (ie, increased to >0.90)
+2	Moderately improved: No open foot lesions; still symptomatic but only with exercise and improved by at least 1 category; ankle-brachial index not normalized but increased by >0.10
+1	Minimally improved: >0.10 increase in ankle brachial index* but no categorical improvement or vice versa (ie, upward categorical shift without an increase in ankle brachial index >0.10)
0	No change: No categorical shift and <0.10 change in ankle brachial index
−1	Mildly worse: No categorical shift but ankle brachial index decreased >0.10, or downward categorical shift with ankle brachial index decrease <0.10
−2	Moderately worse: 1 category worse or unexpected minor amputation
−3	Markedly worse: >1 category worse or unexpected major amputations

^⁎In cases where the ankle-brachial index cannot be accurately measured, an index based on toe pressure is used.