Table 2.

Dialysis adequacy, phosphate clearance, and peritoneal transport status in patients with a serum phosphorous level of ≤5.5 mg/dl versus >5.5 mg/dl and stratified according to residual renal function at 1 year of treatment

Serum PhosphateAll Patients n = 264
Patients with RRFAnuric Patients
≤5.5 mg/dl (n = 141)>5.5 mg/dl (n = 45)≤5.5 mg/dl (n = 44)>5.5 mg/dl (n = 34)
Total weekly urea Kt/V2.7 ± 0.7a2.1 ± 0.4a2.1 ± 0.32.0 ± 0.32.4 ± 0.7
Peritoneal weekly urea Kt/V1.5 ± 0.41.4 ± 0.32.1 ± 0.32.0 ± 0.31.6 ± 0.4
Renal weekly urea Kt/V1.2 ± 0.8a0.7 ± 0.5a0.8 ± 0.8
Total weekly CCr (L/wk per 1.73 m2)93.7 ± 34.5a68.0 ± 20.4a52.6 ± 10.353.7 ± 7.879.0 ± 32.7
Peritoneal weekly CCr (L/wk per 1.73 m2)35.5 ± 9.834.2 ± 7.352.6 ± 10.353.7 ± 10.139.4 ± 11.8
Renal weekly CCr (L/wk per 1.73 m2)58.2 ± 37.1a33.8 ± 22.2a39.6 ± 38.2
Total weekly CPh (L/wk per 1.73 m2)80.1 ± 29.9a62.9 ± 21.5a46.6 ± 10.643.4 ± 11.361.6 ± 27.2
Peritoneal weekly CPh (L/wk per 1.73 m2)34.6 ± 10.934.7 ± 10.746.6 ± 10.643.4 ± 11.337.5 ± 11.7
Renal weekly CPh (L/wk per 1.73 m2)45.5 ± 30.1a28.2 ± 21.1a22.2 ± 29.6
RRF (ml/min per 1.73 m2)5.8 ± 3.7a3.7 ± 2.5a3.8 ± 3.8
D/P Cr0.69 ± 0.10.70 ± 0.10.73 ± 0.10.71 ± 0.10.70 ± 0.09
D/P Ph0.56 ± 0.10.58 ± 0.10.63 ± 0.1b0.57 ± 0.1b0.57 ± 0.11
nPNA (g/kg per day)1.2 ± 0.31.2 ± 0.31.1 ± 0.31.1 ± 0.21.2 ± 0.3
  • Values are expressed as mean ± SD. CCr, creatinine clearance; CPh phosphate clearance.

  • a P < 0.05 patients with RRF and serum phosphorous ≤5.5 mg/dl versus patients with RRF and serum phosphorous >5.5 mg/dl, according to independent sample t test.

  • b P < 0.05 anuric patients with serum phosphorous ≤5.5 mg/dl versus anuric patients with phosphorous >5.5 mg/dl, according to independent sample t test.