Bivariate models | | | | | | |

FGF-23 | | | | | | |

log FGF-23 (per log RU/ml) | 0.48 | 0.08 | 5.72 | <0.001 | 1.11 | 0.30 |

covariates | | | | | | |

log iPTH (per log pg/ml) | 0.26 | 0.11 | 2.48 | 0.015 | 2.42 | 0.07 |

eGFR (per ml/min per 1.73 m^{2}) | −0.11 | 0.03 | −3.60 | 0.001 | 5.65 | 0.31 |

(eGFR)^{2} | <0.01 | <0.01 | 2.73 | 0.008 | | |

(eGFR)^{3} | <0.01 | <0.01 | −2.30 | 0.024 | | |

Multivariate models | | | | | | |

FGF-23 and iPTH | | | | | | |

log FGF-23 (per log RU/ml) | 0.46 | 0.09 | 4.96 | <0.001 | 0.99 | 0.30 |

log iPTH (per log pg/ml) | 0.05 | 0.10 | 0.46 | 0.647 | | |

full multivariate model | | | | | | |

log FGF-23 (per log RU/ml) | 0.29 | 0.11 | 2.77 | 0.007 | 4.38 | 0.39 |

log iPTH (per log pg/ml) | −0.14 | 0.12 | −1.14 | 0.259 | | |

eGFR (per ml/min per 1.73 m^{2}) | −0.10 | 0.03 | −2.90 | 0.005 | | |

(eGFR)^{2} | <0.01 | <0.01 | 2.45 | 0.017 | | |

(eGFR)^{3} | <0.01 | <0.01 | −2.17 | 0.033 | | |