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Table 4 Multivariate analysis comparing pairs of treatment groups

From: An examination of factors influencing the choice of therapy for patients with coronary artery disease

  Analysis of maximum likelihood estimates odds ratio/p-deviance
Parameter Entry df estimate std. error Wald χ2 Pr > chi square std. estimate point estimate 99% Wald CI 99% Wald CI
(a) Medication vs. PTCA           
   Constant 0 1 1.131 1.454 0.606 0.437 .    
   LAD artery disease 1 1 0.970 0.240 16.374 < 0.001 0.536 2.639 1.423 4.894
   Previous intervention 2 1 1.093 0.322 11.536 0.001 . 8.896 1.696 46.675
   Increasing age 3 1 -0.065 0.021 9.364 0.002 -0.397 0.937 0.887 0.990
   Hypertension 4 1 -0.664 0.229 8.373 0.004 . 0.265 0.081 0.864
   Angina frequency 5 1 0.883 0.341 6.694 0.010 0.337 2.418 1.004 5.822
(b) PTCA vs. CABG           
   Intercept 0 1 -1.889 0.710 7.091 0.008 .    
   SIP: Mobility range 1 1 0.475 0.112 17.868 < 0.001 0.667 1.607 1.204 2.147
   Circumflex artery disease 2 1 0.756 0.215 12.345 < 0.001 0.490 2.128 1.223 3.704
   Previous intervention 3 1 -1.246 0.337 13.674 < 0.001 . 0.083 0.015 0.469
   Higher educational attainment 4 1 -0.661 0.204 10.545 0.001 -0.441 0.516 0.305 0.872
(c) Medication vs. CABG           
   Intercept 0 1 -8.831 1.548 32.561 < 0.001 .    
   LAD artery disease 1 1 1.616 0.373 18.804 < 0.001 0.853 5.034 1.927 13.150
   Previous cerebral events 2 1 -2.463 0.707 12.127 0.001 . 0.007 0.000 0.277
   SIP: Mobility range 3 1 0.620 0.162 14.761 < 0.001 0.870 1.859 1.227 2.818
   Circumflex artery disease 4 1 1.095 0.293 13.991 < 0.001 0.661 2.991 1.406 6.359