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Estimation of Glomerular Filtration Rate Based on Serum Cystatin C versus Creatinine in a Uruguayan Population

机译:基于血清胱抑素C与肌酐的乌拉圭人群肾小球滤过率估算

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Background. Estimation of glomerular filtration rate (eGFR) from biomarkers has evolved and multiple equations are available to estimate renal function at bedside.Methods. In a random sample of 119 Uruguayans (54.5% women; 56.2 years (mean)), we used Bland and Altman’s method and Cohen’s kappa statistic to assess concordance on a continuous or categorical (eGFR < 60versus≥60 mL/min/1.73 m2) scale between eGFRcys(reference) and eGFR derived from serum creatinine according to the Modification of Diet in Renal Disease (eGFRmdrd) or the Chronic Kidney Disease Epidemiology Collaboration equations (eGFRepi) or from both serum cystatin C and creatinine (eGFRmix).Results. In all participants, eGFRmdrd, eGFRepi, and eGFRmixwere, respectively, 9.7, 11.5, and 5.6 mL/min/1.73 m2higher (P<0.0001) than eGFRcys. The prevalence of eGFR <60 mL/min/1.73 m2was the highest for eGFRcys(21.8%), intermediate for eGFRmix(11.8%), and the lowest for eGFRmdrd(5.9%) and eGFRepi(3.4%). Using eGFRcysas reference, we found only fair agreement with the equations based on creatinine (Cohen’s kappa statistic 0.15 to 0.23).Conclusion. Using different equations we reached clinically significant differences in the estimation of renal function. eGFRcysprovides lower estimates, resulting in higher prevalence of eGFR <60 mL/min/1.73 m2.
机译:背景。从生物标志物估计肾小球滤过率(eGFR)已经发展,并且有多个方程可用于估算床边的肾功能。在119名乌拉圭人(54.5%的女性; 56.2岁(平均))的随机样本中,我们使用Bland和Altman方法以及Cohen的kappa统计量来评估连续或分类(eGFR <60versus≥60≥mL/ min / 1.73 m2)的一致性。根据肾脏疾病饮食修改(eGFRmdrd)或慢性肾脏病流行病学协作方程(eGFRepi)或血清半胱氨酸蛋白酶抑制剂C和肌酐(eGFRmix)从血清肌酐得出的eGFRcys(参考)和eGFR之间的比例。在所有参与者中,eGFRmdrd,eGFRepi和eGFRmix分别比eGFRcys高9.7、11.5和5.6 mL / min / 1.73 m2(P <0.0001)。 eGFR <60 mL / min / 1.73 m2的患病率最高,其中eGFRcys(21.8%),中间eGFRmix(11.8%),最低eGFRmdrd(5.9%)和eGFRepi(3.4%)。使用eGFRcysas作为参考,我们发现与基于肌酸酐的方程式(科恩的kappa统计量为0.15至0.23)仅有合理的一致性。使用不同的方程式,我们在估计肾功能方面达到了临床上的显着差异。 eGFRcy可提供较低的估计值,从而导致eGFR的患病率更高,<60 mL / min / 1.73 m2。

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