Table 2. Relative risk of mortalitya

VariableAlive (n = 330)Decreased (n = 185)Risk Ratio(95% CI)P Value
a CI, confidence interval; PD, peritoneal dialysis; HD, hemodialysis
b All biochemical characteristics’ risk ratios were adjusted for age, gender, race, diabetes, and dialysis type and duration.
Age (per 10 yr)55.1 (16.8)68.4 (12.7)1.481.33–1.65<0.001
Gender (female versus male)129 (39.1%)78 (42.2%)1.090.82–1.470.543
Diabetes99 (30.0%)77 (41.6%)1.551.16–2.080.003
Race0.028
    White180 (54.5%)118 (63.8%)1.00
    Asian97 (29.4%)44 (23.8%)0.680.48–0.960.028
    other53 (16.1%)23 (12.4%)0.640.41–1.000.051
Dialysis type (PD versus HD)101 (30.6%)57 (30.8%)1.080.79–1.490.613
Dialysis duration (mo)18.6 (5.8–34.8)24.2 (8.5–44.2)1.000.99–1.010.111
    <6 mo86 (26.1%)39 (21.1%)1.00
    6–18 mo78 (23.6%)39 (21.1%)0.950.61–1.480.814
    >18 mo166 (50.3%)107 (57.8%)1.160.80–1.670.437
Dialysis adequacy0.070
    PRU ≤65, Kt/V ≤1.840 (12.1%)29 (15.7%)1.00
    PRU 66–70, Kt/V 1.9–2.158 (17.6%)44 (23.8%)0.760.50–1.140.179
    PRU >70, Kt/V >2.1232 (70.3%)112 (60.5%)1.110.69–1.770.670
Previous transplant26 (7.9%)10 (5.4%)0.710.38–1.350.298
Hemoglobin (per 5 g/L)b116.7 (16.3)113.2 (18.3)0.930.89–0.97<0.001
Albumin (g/L)b36.0 (4.5)33.3 (4.8)0.910.88–0.94<0.001
Cholesterol (mmol/L)b4.98 (1.14)4.98 (1.19)0.990.77–1.290.988
Triglycerides (mmol/L)b2.16 (1.56)2.10 (1.17)1.010.83–1.230.912
C (mmol/L)b
    continuous (per 1 mmol/L)2.33 (0.21)2.30 (0.25)0.580.28–1.200.142
    categorical0.730
    <2.50269 (81.5%)147 (79.5%)1.00
    2.50–2.5518 (5.5%)11 (5.9%)1.150.62–2.130.666
    2.55–2.6526 (7.9%)11 (5.9%)0.980.52–1.820.940
    >2.6517 (5.2%)16 (8.6%)1.330.79–2.250.287
Pi (mmol/L)b
    continuous (per 1 mmol/L)1.70 (0.51)1.65 (0.57)1.371.02–1.850.041
    categorical0.025
    <1.78203 (61.5%)112 (60.5%)1.00
    1.78–1.9433 (10.0%)17 (9.2%)1.320.79–2.220.293
    1.95–2.2655 (16.7%)31 (16.8%)1.531.02–2.300.039
    >2.2639 (11.8%)25 (13.5%)1.821.16–2.840.009
Ca*Pi product (mmol2/L2)b
    continuous (per 1 mmol2/L2)3.95 (1.21)3.81 (1.43)1.120.99–1.260.081
    categorical0.033
    <4.43228 (69.1%)134 (72.4%)1.00
    4.43–4.8439 (11.8%)12 (6.5%)0.760.42–1.390.382
    4.84–5.6437 (11.2%)22 (11.9%)1.450.92–2.290.108
    >5.6426 (7.9%)17 (9.2%)1.851.10–3.110.020
iPTH (pmol/L)b
    continuous (per 1 log iPTH)15.9 (6.6–37.8)15.7 (7.5–33.5)0.990.88–1.110.870
    categorical
    <27.3216 (65.5%)127 (68.6%)1.210.88–1.660.232
    ≥27.3114 (34.5%)58 (31.3%)1.00
Pi, Ca, and iPTH*0.042
    Pi <1.78, Ca <2.5, iPTH>27.358 (17.6%)22 (11.9%)1.00
    Pi <1.78, Ca >2.5, iPTH>27.35 (1.5%)2 (1.1%)1.780.41–7.700.439
    Pi <1.78, Ca >2.5, iPTH<27.331 (9.4%)18 (9.7%)1.510.80–2.850.200
    Pi <1.78, Ca <2.5, iPTH<27.3109 (33.0%)70 (37.8%)1.801.11–2.930.017
    Pi >1.78, Ca <2.5, iPTH<27.359 (17.9%)28 (15.1%)2.161.21–3.850.008
    Pi >1.78, Ca <2.5, iPTH>27.343 (13.0%)27 (14.6%)2.321.30–4.110.004
    Pi >1.78, Ca >2.5, iPTH>27.38 (2.4%)7 (3.8%)2.751.15–6.540.023
    Pi >1.78, Ca >2.5, iPTH<27.317 (5.2%)11 (6.0%)3.201.52–6.710.002