Figure 2.

(a) Unadjusted Kaplan-Meier survival curves of two-year mortality by ACS presentation (b) Unadjusted and sequential adjustment of two-year mortality by ACS presentation (Model 1 = unadjusted comparison; Model 2 = adjustment for demographic variables (age, race, sex, insurance status); Model 3 = adjustment for demographic and hospital site variables (Mid-America Heart Institute or Truman Medical Center); Model 4 = adjustment for demographic, site, and clinical variables (prior angina, prior myocardial infarction, prior percutaneous coronary intervention, prior coronary artery bypass graft, congestive heart failure, hypertension, diabetes, hyperlipidemia, cerebrovascular accident/transient ischemic attack, renal failure, anemia and tobacco use); Model 6 = adjustment for demographic, site, clinical, and treatment (revascularization [percutaneous coronary intervention, coronary artery bypass graft, thrombolysis] and discharge medications [angiotensin converting enzyme inhibitors, lipid lowering agents, beta-blockers, calcium channel blockers, nitrates, and aspirin]) variables)