Table 1.

List of terms and diagnostic criteria for PAD by manual abstraction

List of terms used for manual abstraction
ABI	0: if performed and negative; 1: if performed and positive; 9: if not performed
Claudication/ weak peripheral pulse/ulcer	0: if not reported in clinical history, 1: if reported
PAD clinic note	Is there a mention in the clinical notes regarding history of peripheral arterial disease defined as "Arteriosclerosis obliterans" (ASO) or other definitions of ascertained PAD? 0: No. 1: Yes.
Imaging	Assess whether there are previous ultrasounds (US), computed tomography angiography (CTA) or magnetic resonance angiography (MRA) studies. 0: present and normal. 1: present and abnormal (indicating stenosis >=50% or > then MILD). Use 9 if they are not available or not performed at all.
Lower extremity revascularization procedure (surgical or catheter-based)	0: if not performed, 1: if performed
Lower extremity amputation	0 = no history of amputation; 1A: ischemic major (below knee or greater); 1B ischemic minor (distal to below knee e.g. toe or metatarsal); 1C non-ischemic major or minor
Criteria for PAD by manual abstraction
PAD	Abnormal ABI (<= 0.90 or >= 1.40), poorly compressible arteries (PCA)/ non compressible vessels (NCV), positive angiogram result with "severe stenosis" or "occlusion", prior revascularization of the lower extremity, positive US, CTA or MRA studies of the lower extremity indicating stenosis.
Not PAD	Normal ABI values or negatives imaging results or no mention of PAD in clinical notes.