Table 2.

Serum concentrations and eGFR

CKD-EPI equation
 p-Cresyl sulfate0.35<0.0010.46<0.001
 Indoxyl sulfate0.25<0.0010.46<0.001
MDRD equation
 p-Cresyl sulfate0.35<0.0010.46<0.001
 Indoxyl sulfate0.26<0.0010.46<0.001
  • Linear regression analysis of the relationship between eGFR or reciprocal of eGFR and serum concentrations of creatinine, BUN, p-cresyl sulfate, and indoxyl sulfate. eGFR, estimated GFR; 1/eGFR, reciprocal of eGFR; R2, coefficient of determination; CKD-EPI, Chronic Kidney Disease Epidemiology Collaboration; MDRD, Modification of Diet in Renal Disease.