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Table 5 Associations between dialysis modality and mortality for various combinations of the effect modifiers

From: Propensity scores in the presence of effect modification: A case study using the comparison of mortality on hemodialysis versus peritoneal dialysis

   Hazard ratios of peritoneal dialysis vs. hemodialysis (95% Confidence Intervals)*
   >3-6 months # >6-15 months # >15 months #
Age DM    
40 No 0.26 (0.17; 0.41) 0.51 (0.39; 0.68) 0.86 (0.74; 1.00)
40 Yes 0.40 (0.23; 0.68) 0.59 (0.44; 0.81) 1.06 (0.88; 1.26)
50 No 0.35 (0.25; 0.48) 0.62 (0.51; 0.76) 0.95 (0.85; 1.05)
50 Yes 0.53 (0.34; 0.83) 0.72 (0.56; 0.93) 1.17 (1.00; 1.35)
60 No 0.46 (0.37; 0.58) 0.75 (0.65; 0.87) 1.05 (0.97; 1.13)
60 Yes 0.71 (0.48; 1.04) 0.87 (0.71; 1.09) 1.29 (1.12; 1.48)
70 No 0.62 (0.50; 0.76) 0.92 (0.80; 1.05) 1.16 (1.07; 1.25)
70 Yes 0.95 (0.64; 1.39) 1.07 (0.85; 1.33) 1.42 (1.23; 1.65)
  1. * From models including age, gender, primary renal disease, year of start of RRT, center and the interaction terms age by modality, diabetes by modality, age by diabetes and gender by diabetes.
  2. DM = diabetes as primary renal disease
  3. # Models stratified for time on dialysis, >3-6 months, >6-15 months, and >15 months.