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Table 3 Multivariable logistic regression for odds of IABP placement

From: Intra-aortic balloon pump placement in coronary artery bypass grafting patients by day of admission

Factor Odds Ratio 95% Confidence Interval p-value
Day of Admission
 Weekday Reference   
 Weekend 1.30 1.21–1.40 < 0.001
Age Category
  > 70 age Reference   
 60–69 age 1.06 0.97–1.15 0.221
 50–59 age 1.06 0.95–1.17 0.320
 40–49 age 1.09 .94–1.27 0.245
 18–39 age 1.79 1.41–2.28 < 0.001
Race
 White Reference   
 Black 0.91 0.68–0.95 0.012
 Hispanic 1.04 0.93–1.16 0.510
 Asian 1.10 0.98–1.23 0.095
 Other 1.03 0.73–1.45 0.875
Insurance
 Private Coverage Reference   
 MediCal 1.01 0.84–1.22 0.900
 Medicare 0.89 0.77–1.04 0.163
 Self-Pay 1.28 1.02–1.61 0.031
 Other Non-Federal Indigent 0.95 0.75–1.22 0.706
 Other 1.21 0.81–1.82 0.352
BMI Class
 Not Coded Reference   
 BMI 25–29.9 0.89 0.80–0.98 0.022
 BMI > 30 0.90 0.79–1.01 0.081
Heart Failure 2.17 2.09–2.48 < 0.001
Severe Peripheral Vascular Disease 0.66 0.59–0.75 < 0.001
Aortic/Iliofemoral Bypass Grafts 1.6 1.10–2.34 0.015
Aortic Regurgitation 0.73 0.26–2.04 0.549
Sustained Tachyarrhythmias 1.96 1.77–2.17 < 0.001
Acute Coronary Syndrome 0.48 0.44–0.53 < 0.001
Hospital Characteristics
Beds
  228+ Beds Reference   
  122–227 Beds 1.23 0.66–2.31 0.509
  52–121 Beds 1.15 0.82–1.62 0.43
   < 52 Beds 0.94 0.82–1.08 0.404
Urbanicity
  Urban Reference   
  Non-Urban 1.27 0.91–1.79 0.164
Teaching Status
  Teaching Reference   
  Non-Teaching 0.67 0.48–0.93 0.018
Hospital Volume
   < 199 Patients Reference   
  200–399 Patients 0.79 0.63–1.01 0.055
  400–699 Patients 0.43 0.33–0.56 < 0.001
   > 700 Patients 0.49 0.41–0.58 < 0.001
  1. BMI Body Mass Index; IABP Intra-Aortic Balloon Pump