Table 1.

Comorbidities, risk factors and procedures with corresponding ICD-9-CM codes

	ICD-9-CM codes
Current smoking	305.1, V15.82
Obesity	278.xx
Hypertension	401, 401.0, 401.1, 401.9
Lipid metabolism disorders	272.4
Renal disease	403.01, 403.11, 403.91, 404.02, 404.03, 404.12, 404.13, 404.92, 404.93, 582.x, 583.0–583.7, 585.x, 586.x, 588.0, V42.0, V45.1, V56.x
Atrial fibrillation	427.31
Congestive heart failure	398.91, 402.01, 402.11, 402.91, 404.01, 404.03, 404.11, 404.13, 404.91, 404.93, 425.4–425.9, 428.x
Mechanical ventilation	96.7, 96.70, 96.71, 96.72
Hemodyalisis/peritoneal dialysis	39.95, 54.98
Fibrinolysis	99.10
Coronary artery bypass graft (CABG)	36.10–36.19
Percutaneous coronary intervention (PCI)	36.04, 36.06, 36.07, 36.09, 0.66
Decompressive craniectomy	01.24
Carotid endarterectomy	38.11, 38.12
Carotid angioplasty	00.61, 00.62, 00.63, 00.64, 00.65
Thoracic aorta aneurysm open surgery	38.35, 38.45
Endovascular implantation of graft in thoracic aorta (TEVAR)	39.73
Abdominal aorta aneurysm open surgery	38.44
Endovascular implantation of graft in abdominal aorta (EVAR)	39.71
Minor amputation (any lower extremity amputation distal to the ankle joint)	84.10–84.12
Major amputation (any lower extremity amputation through or proximal to the ankle joint)	84.13–84.17
Lower extremity revascularization	39.25, 39.29, 38.38, 38.48
Lower extremity angioplasty	00.60, 39.50