Table 2.

GFR Estimates and Difference in Estimatesa

Mean eGFR (Mayo Clinic CysC) ± SDMean eGFR (CHEO CysC) ± SDMean Absolute Difference (95% CI)bMean % Difference (95% CI)c
Whole cohort (n = 94)52.9 ± 21.960.1 ± 24.77.2 (5.2, 9.3)d15.3 (11.3, 19.4)d
CysC <1.41 mg/L (n = 47)69.8 ± 17.679.2 ± 19.79.5 (5.8, 13.1)d15.7 (8.9, 22.4)d
CysC ≥1.41 mg/L (n = 47)36.0 ± 8.941.0 ± 10.15.0 (3.5, 6.5)d15.0 (10.8, 19.2)d
  • CysC, cystatin C; CHEO, Children's Hospital of Eastern Ontario; CI, confidence interval.

  • a Expressed as ml/min per 1.73 m2.

  • b Absolute difference = CHEO eGFR − Mayo Clinic eGFR.

  • c % difference = (CHEO eGFR − Mayo Clinic eGFR)/Mayo Clinic eGFR × 100.

  • d P < 0.0001.