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Table 3 Results of multilevel analysis: mediation effect examination

From: Do low-income coronary artery bypass surgery patients have equal opportunity to access excellent quality of care and enjoy good outcome in Taiwan?

  Model 1(y=mortality) Model 2(y=patterns of QOC) Model 3(y=mortality)
  Odds ratio 95% C.I. Odds ratio 95% C.I. Odds ratio 95% C.I.
  LCL UCL LCL UCL LCL UCL
Fixed-effects       
Hospital-level          
Accreditation status (ref. = Medical center) 1.322 0.904 1.932 2.401*** 1.530 3.767 1.410 0.971 2.048
Surgeon-level          
Surgeon´s age 0.954*** 0.933 0.976 1.005 0.981 1.029 0.954*** 0.933 0.975
Patient level          
Income(ref. = low income) 0.353*** 0.193 0.644 2.291* 1.033 5.078 0.369** 0.202 0.673
Patterns of QOC (ref.=excellent)        2.623*** 1.737 3.960
Age 1.055*** 1.045 1.066 0.991** 0.985 0.998 1.054*** 1.044 1.065
Gender (ref. = Male) 1.292** 1.058 1.579 0.848* 0.719 1.000 1.280* 1.047 1.565
Number of vessels obstructed (ref. = >2+ vessels) 2.029*** 1.641 2.509 1.670*** 1.425 1.957 2.100*** 1.699 2.595
Comorbidity index (ref. = 2+) 0.637*** 0.526 0.770 1.029 0.896 1.180 0.634*** 0.524 0.767
Random effects Variance Std.err.   Variance Std.err.   Variance Std.err.  
Intercept: surgeon (hospital) 0.6100 0.2796   1.1590 0.2978   0.5419 0.2619  
Intercept: surgeon 0.0234 0.2602   0.1473 0.2226   0.02730 0.2428  
  1. *p<0.05 **p<0.01 ***p<0.001.
  2. QOC: quality of care; C.I.: confidence interval; LCL: Lower confidence limit; UCL: Upper confidence limit.