Table 3.

Univariate and multivariate regression analysis

Independent VariablesLnFGFLnCalcitriolLnPTH24h-FEPhos
βPR2βPR2βPR2βPR2
Univariate models
    Age0.010.0030.07−0.010.0090.050.04<0.00010.160.230.010.05
    LnPTH0.10.0050.06−0.040.060.034.7<0.00010.26
    LnFGF-23−0.26<0.00010.170.670.0050.065.90.0060.06
    LnCalcitriol−0.65<0.00010.17−0.70.060.03−5.40.120.02
    LnCalcidiol−0.130.170.020.20.0010.08−0.50.050.03−1.40.560.003
    Phosphate−0.160.060.03−0.23<0.00010.13−0.270.240.01
    Cac−0.030.820.0−0.180.060.03−0.030.920.0
    AP0.0030.00050.090.0020.0030.070.0090.0040.10
    eGFR−0.01<0.00010.160.0050.0010.080.04<0.00010.22−0.26<0.00010.16
    Total bicarbonate−0.730.120.02
    24h-phosphaturia0.00010.520.0040.00070.100.02
Multivariate models0.260.310.330.30
    LnPTH3.7<0.0001
    LnFGF−0.22<0.0001
    LnCalcitriol−0.510.0001
    LnCalcidiol0.160.004−0.580.009
    Phosphate−0.180.0004
    eGFR−0.010.0003−0.04<0.0001−0.150.01
    24h-phosphaturia0.0010.001
  • Parameters included in the multivariate model: all parameters univariately associated at P ≤ 0.2, after excluding colinearity. AP, alkaline phosphatases; Cac, albumin-corrected calcium; CKD, chronic kidney disease; eGFR, estimated GFR; FGF-23, fibroblast growth factor-23; PTH, parathyroid hormone.