Table 1. International Classification of Diseases, Ninth Edition, Clinical Modification (ICD‐9‐CM) Codes of the Variables Included in the Propensity Score Matchinga
VariableICD‐9‐CM Code
Acute ischemic stroke433.01, 433.11, 433.21, 433.31, 433.81433.91, 434.01, 434.11, 434.91, 435.x, 436
Intracranial hemorrhage430, 431, 432.x
Gastrointestinal bleeding153
Cardiogenic shock785.51
Family history of CADV17.3
Past MI412
Past PCIV45.82
Past CABGV45.81
Past stroke/TIAV12.54
CAD414.00, 414.01, 414.02, 414.03, 414.04, 414.05, 414.06, 414.07
Carotid artery disease433.10
Smoking historyV15.82, 305.1
Dyslipidemia53
Atrial fibrillation427.31
Dementia290.xx, 294.1x, 294.2x, 294.8, 331.0–331.12, 331.82, 797
  • CABG indicates coronary artery bypass grafting; CAD, coronary artery disease; MI, myocardial infarction; PCI, percutaneous coronary intervention; TIA, transient ischemic attack.

  • a Other variables not reported in the table were collected using Elixhauser Comorbidity Software.15