Performance of bias, precision and accuracy between measured GFR and estimated GFR in the validation data set.

<p>Abbreviations: GFR, glomerular filtration rate; MDRD, Modification of Diet in Renal Disease; CKD-EPI, Chronic Kidney Disease Epidemiology Collaboration; CI, confidence interval; IQR, interquartile range.</p><p>Performance of bias, precision and accuracy between measured GFR and estimated GFR in the validation data set.