Table 7. Multivariate Cox proportional-hazards model for death, with RR (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, subgroup determined on the basis of age and the presence of diabetes mellitus, and censoring strategy

AT CensoringaITT Censoringb
Adjusted RR95% CIAdjusted RR95% CI
a Overall test for interaction of modality and time and subgroup, Wald χ2 = 8.1927; df = 3; P = 0.0422.
b Overall test for interaction of modality and time and subgroup, Wald χ2 = 5.9498; df = 3; P = 0.1141.
Age <60 yr/no diabetes mellitus
    3 to 24 mo (n = 488)0.600.25 to 1.420.770.34 to 1.73
    24 to 48 mo (n = 223)1.150.35 to 3.810.770.31 to 1.94
Age <60 yr/diabetes mellitus
    3 to 24 mo (n = 108)9.991.29 to 77.296.351.42 to 28.36
    24 to 48 mo (n = 50)0.600.13 to 2.720.410.13 to 1.32
Age ≥60 yr/no diabetes mellitus
    3 to 24 mo (n = 479)1.280.71 to 2.301.030.62 to 1.72
    24 to 48 mo (n = 250)0.300.18 to 0.510.410.25 to 0.67
Age ≥60 yr/diabetes mellitus
    3 to 24 mo (n = 147)1.450.67 to 3.141.280.65 to 2.52
    24 to 48 mo (n = 50)0.450.18 to 1.170.660.30 to 1.49