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Table 3 Kappa coefficients between the equations. 95% confidence intervals are shown between brackets

From: Creatinine-or cystatin C-based equations to estimate glomerular filtration in the general population: impact on the epidemiology of chronic kidney disease

  MDRD CKD-EPI CKD-EPI Cys CKD-EPI mix
MDRD XXXXXXXXX 0.84 [0.81–0.86] 0.32 [028–0.36] 0.48 [0.44–0.53]
CKD-EPI   XXXXXXXXX 0.39 [0.33–0.44] 0.59 [0.55–0.64]
CKD-EPI Cys    XXXXXXXXX 0.71 [0.66–0.76]
CKD-EPI mix     XXXXXXXXX