Table 6. Multivariate Cox proportional-hazards model for death with RRc (and 95% CI) for HD patients, compared with PD patients, adjusted for age, gender, comorbidity, primary kidney disease, SGA score, hemoglobin concentration, serum albumin level, and renal Kt/Vurea at baseline, according to time since the initiation of dialysis and censoring strategy

Time Period (mo)AT CensoringaITT Censoringb
Adjusted RR95% CIAdjusted RR95% CI
a Overall test for interaction of modality and time period, Wald χ2 = 17.74; df = 3; P = 0.0005.
b Overall test for interaction of modality and time period, Wald χ2 = 14.35; df = 3; P = 0.0025. ITT, intention-to-treat.
3 to 121.440.83 to 2.501.320.80 to 2.18
12 to 241.040.61 to 1.771.060.66 to 1.72
24 to 360.530.31 to 0.910.550.34 to 0.87
36 to 480.290.16 to 0.570.420.24 to 0.73