Table 6.
Simple linear correlation analysis between phosphate parameters obtained from 24-h urine collection and phosphaturic hormones.
| Variable | Spearman Coefficient | Significance (p) |
|---|---|---|
| Urine P excretion (mg/day) | ||
| c-FGF23 (RU/mL) | −0.149 | 0.225 |
| PTH (pg/mL) | −0.096 | 0.435 |
| Urine P/Cr ratio (mg/mg) | ||
| c-FGF23 (RU/mL) | −0.009 | 0.938 |
| PTH (pg/mL) | 0.148 | 0.221 |
| Urine P/UUN ratio (mg/g) | ||
| c-FGF23 (RU/mL) | −0.022 | 0.859 |
| PTH (pg/mL) | 0.147 | 0.228 |
| eGFR (CKD-EPI) | ||
| c-FGF23 (RU/mL) | −0.534 | <0.001 |
| PTH (pg/mL) | −0.265 | 0.050 |
| FeP (%) | ||
| c-FGF23 (RU/mL) | 0.367 | 0.002 |
| PTH (pg/mL) | 0.381 | 0.001 |
Fibroblast growth factor 23 (c-FGF23) and parathyroid hormone (PTH). Dependent variables: urine P excretion (mg/day): urine phosphate excretion (mg/day). Urine P/Cr ratio (mg/mg): urine phosphate/creatinine ratio (mg/mg)). Urine P/UUN ratio (mg/g): urine phosphate/urine urea nitrogen ratio (mg/mg). eGFR (CKD-EPI): glomerular filtration rate estimated by CKD-EPI (mL/min/1.73 m2). FeP (%): fractional excretion of P (%).