TABLE 1

Results of Differences in GFR and Plasma Concentration Between Dilution and Direct Methods

Agreement analysisDifference in GFR* (mL/min/1.73 m2)Difference in plasma concentration† (%ID/L/1.73 m2)
Mean3.936−0.135
SD1.9730.0887
95% of difference−0.009 to 7.881−0.3124 to 0.0423
SEM0.7870.027
95% confidence interval−0.623 to 2.198−0.0364 to −0.0904

  • ↵*Difference in GFR = GFRdil − GFRdir.

  • ↵†Difference in plasma concentration = Pdil − Pdir.