Table 2.
Estimated weekly phosphate metabolic balance in MHD patients
| Group I+II | Group III | P | |
|---|---|---|---|
| Urine ≤200 ml/d (n=94) | Urine >200 ml/d (n=40) | ||
| Dietary phosphate (mg/w) | 6514±1297 | 6724±1512 | 0.35 |
| Removal by dialysis (mg/w) | 1983±728 | 2124±672 | 0.18 |
| Removal by urine (mg/w) | 122±106 | 769±318 | <0.001 |
| Removal by CaCO3 (mg/w) | 397±252 | 266±263 | 0.01 |
| △P (mg/w) | 1641±832 | 982±1014 | <0.001 |
Values are means ± SD. Dietary phosphate was estimated as follows: nPNA × 15 × dry body weight. △P was calculated as: (dietary phosphate − CaCO3 binding phosphate) × 60% − phosphate elimination by dialysis and urine. MHD, maintenance hemodialysis; nPNA, normalized protein nitrogen appearance.