Table 1.
Creatinine and cystatin C-based equations for glomerular filtration rate estimation.
Table 2.
General characteristics of study population by sex.
Fig 1.
Bland and Altman analysis between mGFR and creatinine-based equations (with and without the ethnic factor).
All values are expressed in mL/min/1.73m2. CKD-EPI SCr: Chronic Kidney Disease-Epidemiology Collaboration equation based on serum creatinine only, with ethnic factor; CKD-EPI SCr nef: CKD-EPI without ethnic factor. MDRD: Modification of Diet in Renal Disease study equation with ethnic factor; MDRD nef: MDRD without ethnic factor. The central line represents the mean difference between measured and estimated GFR, whereas the upper and lower lines represent the limits of agreement (mean difference ± 2SD).
Fig 2.
Bland and Altman analysis between mGFR and cystatin C-based and combined equations (with and without the ethnic factor).
All values are expressed in mL/min/1.73m2. CKD-EPI SCys CKD-EPI equation based on cystatin C only; CKD-EPI SCrCys: CKD-EPI combining creatinine and cystatin C with ethnic factor. CKD-EPI SCrCys nef: CKD-EPI combining serum creatinine and cystatin C without ethnic factor. The central line represents the mean difference between measured and estimated GFR, whereas the upper and lower lines represent the limits of agreement (mean difference ± 2SD).
Table 3.
Performance of the MDRD and CKD-EPI (with and without ethnic factors).
Table 4.
Comparison of accuracy within 30% and within 10% of estimating equations by exact McNemar tests.