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Table 2 Agreement between different kidney function estimators in diagnosing CKD stage 3–5 (kappa statistic and 95% confidence interval)

From: Chronic kidney diseases in mixed ancestry south African populations: prevalence, determinants and concordance between kidney function estimators

Estimator 1 Estimator 2 Men Women Total
Cockcroft-Gault MDRD corrected 0.27 (0.13-0.40) 0.60 (0.52-0.68) 0.51 (0.44-0.58)
  MDRD 0.57 (0.44-0.70) 0.52 (0.45-0.58) 0.53 (0.47-0.59)
  CKD-EPI corrected 0.35 (0.20-0.47) 0.66 (0.58-0.74) 0.57 (0.49-0.64)
  CKD-EPI 0.64 (0.52-0.76) 0.65 (0.59-0.72) 0.65 (0.59-0.71)
MDRD corrected MDRD 0.46 (0.30-0.60) 0.41 (0.34-0.47) 0.42 (0.36-0.48)
  CKD-EPI corrected 0.87 (0.71-0.97) 0.92 (0.87-0.96) 0.91 (0.86-0.95)
  CKD-EPI 0.53 (0.34-0.70) 0.57 (0.49-0.65) 0.57 (0.50-0.64)
MDRD CKD-EPI corrected 0.51 (0.35-0.64) 0.38 (0.32-0.45) 0.41 (0.34-0.47
  CKD-EPI 0.85 (0.74-0.93) 0.78 (0.72-0.82) 0.79 (0.74-0.83)
CKD-EPI corrected CKD-EPI 0.58 (0.43-0.73) 0.54 (0.46-0.61) 0.55 (0.48-0.62)
  1. CG, Cockcroft-Gault; CKD-EPI, Chronic Kidney Disease Collaboration Epidemiology; DBP, 4-v-MDRD, four variable Modification of Diet in Renal Disease.