Table 5. Proportional hazards models of mortality using combined biochemical parameters by dialysis duration category

Variable<6 Months6–18 Months>18 Months
RR (95% CI)P ValueRR (95% CI)P ValueRR (95% CI)P Value
Age (per 10 yr)1.50 (1.13–1.99)0.0051.60 (1.12–2.30)0.0111.80 (1.52–2.13)<0.001
Gender (female versus male)1.26 (0.51–3.07)0.6191.74 (0.82–3.70)0.1510.99 (0.65–1.49)0.952
Diabetes0.83 (0.39–1.79)0.6381.67 (0.78–3.59)0.1892.63 (1.65–4.19)<0.001
Dialysis type (PD versus HD)1.56 (0.62–3.96)0.3461.61 (0.71–3.63)0.2521.25 (0.72–2.18)0.431
Dialysis duration (per 1 mo)1.10 (0.85–1.34)0.5740.98 (0.89–1.10)0.6581.01 (1.00–1.02)0.008
Race
    White1.001.001.00
    Asian0.32 (0.09–1.09)0.0690.75 (0.34–1.66)0.4780.63 (0.40–1.03)0.065
    other0.63 (0.21–1.95)0.4260.26 (0.08–0.84)0.0240.78 (0.41–1.48)0.450
Dialysis adequacy
    PRU ≤65, Kt/V ≤1.81.001.001.00
    PRU 66–70, Kt/V 1.9–2.11.91 (0.59–6.19)0.2810.38 (0.13–1.10)0.0750.44 (0.22–0.85)0.015
    PRU >70, Kt/V >2.13.10 (0.89–10.82)0.0760.78 (0.24–1.54)0.675)0.58 (0.29–1.16)0.127
Hemoglobin (per 5 g/L)0.88 (0.78–0.99)0.0290.98 (0.89–1.01)0.7100.99 (0.92–1.06)0.758
Albumin (per 1 g/L)0.81 (0.73–0.89)<0.0010.86 (0.78–0.96)0.0090.94 (0.89–0.99)0.015
    Pi <1.78, Ca <2.5, iPTH >27.31.001.001.00
    Pi <1.78, Ca >2.5, iPTH >27.3////4.12 (0.88–19.24)0.072
    Pi <1.78, Ca >2.5, iPTH <27.31.47 (0.13–16.49)0.7531.96 (0.49–7.88)0.3411.84 (0.80–4.26)0.152
    Pi <1.78, Ca <2.5, iPTH <27.32.12 (0.54–8.26)0.2800.80 (0.23–2.72)0.7162.04 (1.07–3.88)0.031
    Pi >1.78, Ca <2.5, iPTH <27.32.69 (0.53–13.65)0.2312.89 (0.80–10.47)0.1052.74 (1.26–5.96)0.011
    Pi >1.78, Ca <2.5, iPTH >27.34.69 (1.16–18.95)0.0302.20 (0.48–10.15)0.3133.03 (1.36–6.74)0.007
    Pi >1.78, Ca >2.5, iPTH >27.3//1.47 (0.14–15.26)0.7484.03 (1.46–11.11)0.007
    Pi >1.78, Ca >2.5, iPTH <27.312.43 (1.74–89.03)0.0122.96 (0.69–12.75)0.1453.84 (1.31–11.27)0.014