Table 3.
Simple linear correlation analysis.
| Variable | Spearman Coefficient | Significance (p) |
|---|---|---|
| (A) Total P intake (mg/day) | ||
| Urine P Excretion (mg/day) | 0.189 | 0.128 |
| FeP (%) | −0.088 | 0.484 |
| Urine P Excretion/eGFR (mg/day/GFR) | −0.032 | 0.797 |
| P/Creatinine ratio (mg/mg) | 0.110 | 0.373 |
| UUN (g/day) | −0.11 | 0.927 |
| UUN/Creatinine ratio(mg/mg) | −0.088 | 0.471 |
| P/UUN ratio (mg/g) | 0.284 | 0.018 |
| (B) P/UUN ratio (mg/g) | ||
| P from Animal protein (mg) | 0.160 | 0.189 |
| P from Vegetable protein (mg) | 0.223 | 0.066 |
| Inorganic P (mg) | 0.332 | 0.005 |
(A) Total phosphate intake (mg/day) (dependent variable) vs.independent variables, measured in 24-h urine collection. (B) Phosphate/UUN ratio (mg/mg/g) (dependent variable) vs.independent variables: phosphate ingested from animal protein; phosphate ingested from vegetable protein and inorganic phosphate ingested. P: phosphate; eGFR: estimated glomerular filtration rate using CKD-EPI; FeP: fractional excretion of phosphate; UUN: urine urea nitrogen.