Table 2.

Agreement of eGFRMDRD and eGFRCG versus measured iGFR

Median Δ (ml/min per 1.73 m2)Median % ΔMedian Absolute Δ (ml/min per 1.73 m2)Median Absolute % ΔAccuracy within
30% (%)50% (%)
CKD group
    overall (n = 828) EGFRMDRD (eGFRCG)−0.5 (3.5)b−3 (16)b4.5 (5.6)b20 (23)b71 (60)b89 (77)b
    nondiabetic subgroup (n = 579) eGFRMDRD (eGFRCG)−0.9 (3.1)b−4 (14)b4.6 (5.5)c18 (21)c74 (63)b89 (81)b
    diabetic subgroup (n = 249) eGFRMDRD (eGFRCG)−0.2 (4.2)b1 (22)b4.2 (5.9)c24 (29)b63 (53)c87 (70)b
    MDRD eGFR <30 (n = 546)a eGFRMDRD (eGFRCG)−0.2 (2.9)b−1.0 (20)b3.3 (4.2)b21 (27)b68 (54)b87 (72)b
    MDRD eGFR 30–60 (n = 165)a eGFRMDRD (eGFRCG)−1.6 (4.5)b−4.0 (9.4)b8.1 (9.0)b18 (19)b73 (68)90 (84)c
    MDRD eGFR >60 (n = 117) eGFRMDRD (eGFRCG)−3.5 (7.9)b−4 (10)b11.8 (16.1)14 (20)81 (76)92 (92)
Kidney donor group (n = 459) eGFRMDRD (eGFRCG)−9.0 (1.9)b−9 (2)b15.9 (14.9)c16 (14)c86 (85)98 (97)
  • a The eGFR limit of 60 ml/min per 1.73 m2 was defined using the MDRD equation. Similar results are obtained when the limit is defined by the Cockcroft-Gault equation.

  • b P < 0.001 comparing MDRD and Cockcroft-Gault equations.

  • c P < 0.05 comparing MDRD and Cockcroft-Gault equations.