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Table 2 Cross classification of participants with chronic kidney disease by the various formulae and the kappa statistic for each comparison

From: Prevalence, concordance and associations of chronic kidney disease by five estimators in South Africa

  CKD-EPI cystatin C CKD-EPIcr-cys Cockcroft-Gault MDRD
yes no yes no yes no yes no
CKD-EPI creatinine
yes 21 16 22 15 17 20 37 0
no 29 1026 42 1013 5 1050 5 1050
Kappa 0.462 0.410 0.565 0.934
CKD-EPI cystatin C
yes    47 3 16 34 21 29
no    17 1025 6 1036 21 1021
Kappa    0.815 0.429 0.433
CKD-EPIcr-cys
yes      16 48 23 41
no      6 1022 19 1009
Kappa      0.353 0.406
Cockcroft-Gault
yes        17 5
no        25 1045
Kappa        0.519
  1. Number of participants with chronic kidney disease (CKD): CKD-EPI creatinine: n = 37; CKD-EPI cystatin C: n = 50; CKD-EPI creatinine-cystatin C (CKD-EPIcr-cys): n = 64; Cockcroft-Gault: n = 22; Modification of Diet in Renal Disease (MDRD): n = 42
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