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Table 3 ABI values that correspond to severity of PAD [20, 23]

From: Treatment of specific macrovascular beds in patients with diabetes mellitus

  ABI Typical symptoms
Normal 0.91-1.30 Asymptomatic claudication
Mild 0.70-0.90 Intermittent claudication
Moderate 0.40-0.69 Daily rest pain
Severe < 0.40 Focal tissue necrosis