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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