Table 1: Characteristics of patients with or without 30-day readmission.

Characteristic30-day readmission
NoYes value

Number of patients (2,176)1,917259
Demographics
 Age 0.740
 Female28.532.80.154
 BMI 0.585
Comorbidities
 Type 2 diabetes mellitus31.537.10.070
 Vascular disease27.330.90.224
 COPD15.620.50.043
 History of dialysis2.45.00.015
 Smoking21.422.40.726
Cardiac history
 Recent MI17.313.10.091
 CHF19.925.10.051
 Prior CABG3.92.70.337
 Prior valve1.51.90.611
 Prior PCI18.217.40.760
 NYHA Class IV15.615.40.949
Cardiac anatomy and function
 Left main disease ≥50%28.820.90.007
 Single-vessel disease33.542.60.002
 Two-vessel disease28.530.2
 Three-vessel disease38.127.3
 Ejection fraction
  <40%11.312.30.894
  40%–59%12.611.1
  50%–59%24.324.2
  ≥60%51.752.4
White blood cell count (in 1,000's, mm3)
 <6.019.919.70.037
 6.0–7.939.235.9
 8.0–9.925.321.6
 10.0–12.09.913.1
 >12.05.69.7

COPD: chronic obstructive pulmonary disease; MI: myocardial infarction; CHF: congestive heart failure; CABG: coronary artery bypass graft surgery; PCI: percutaneous coronary intervention; WBC: white blood cell; eGFR: estimated glomerular filtration rate.