Table 5.

Factors associated with PTH: univariate and multivariate regression analyses using PTH as the dependent variable

Independent VariablesM3M12
β coefficientPR2β coefficientPR2
Univariate models
    PTHpre0.44<0.00010.280.370.040.09
    Phosphorus−0.380.090.06−0.330.260.03
    Albumin-corrected calcium0.50.0040.160.490.180.04
    FGF-230.40.0070.140.390.070.07
    Calcitriol0.0090.10.060.00140.920
    eGFR−0.0220.030.09−0.020.180.04
Multivariate
    PTHpre0.45<0.00010.370.04
    FGF-230.300.02--
    eGFR−0.020.04--
Overall model<0.00010.470.040.09
  • Parameters included in the model: FGF-23pre, serum albumin-corrected calcium, phosphorus, PTHpre, calcidiol, calcitriol alkaline phosphatases, and eGFR. PTH and FGF-23 were Ln-transformed for regression analyses. Only parameters univariately associated at P ≤ 0.2 for at least one time point are mentioned in the table.