RESUMO
Introducción: Recientemente el grupo CKD-EPI (ChronicKidney Disease Epidemiology Collaboration) ha publicado una nueva ecuación de estimación del filtrado glomerular(FG) desarrollada a partir de una población de 8.254 individuosa los que se midió el FG mediante aclaramiento de iotalamato (media 68 ml/min/1,73 m2, DE 40ml/min/1,73 m2), y que incluye como variables la creatinina sérica, la edad, el sexo y la raza, con distintas versiones en función de la etnia, el sexo y el valor de la creatinina. La ecuación de CKD-EPI mejoró los resultados en cuanto a exactitud y precisión de la ecuación de elección actual MDRD-IDMS (Modification of Diet in Renal Disease-Isotopic Dilution Mass Spectrometry) en especial para valores de FG superior a 60 ml/min/1,73 m2 en un grupo de 3.896individuos. Material y métodos: El objetivo de nuestro estudio fue comparar los valores de FG estimado utilizando la nueva ecuación de CKD-EPI frente a MDRD-IDMS en una amplia cohorte de 14.427 pacientes (5.234 mujeres y 9.193hombres) y analizar las repercusiones que el uso de CKDEPI tendría a la hora de clasificar a la población en distintos estadios de enfermedad renal crónica (ERC) en función de su FG. Resultados: La media del FG estimado fue 0,6ml/min/1,73 m2 más alto por CKD-EPI que por MDRD-IDMS en el grupo total, 1,9 ml/min/1,73 m2 más alto en el grupo (..) (AU)
Introduction: A recent report by the CKD-EPI Chronic Kidney Disease Epidemiology Collaboration) group describes a new equation to estimate the glomerular filtration rate (GFR).This equation has been developed from a population of8,254 subjects who had the GFR measured by iothalamate clearance (mean 68 ml/min/1.73 m2, SD 40 ml/min/1.73 m2).It includes variables such as serum creatinine, age, sex and race with different formula according to race, sex and creatinine value. The CKD-EPI equation improved the accuracy and precision results of the current first-choice MDRDIDMS(Modification of Diet in Renal Disease-Isotopic Dilution Mass Spectrometry) formula, specially for GFR >60ml/min/1.73 m2 in a group of 3,896 subjects. Methods: The goal of our study was to compare the estimated GFR by using the new equation CKD-EPI with MDRD-IDMS in a wide cohort of 14,427 patients (5,234 women and 9,193 men),and to analyze the impact of the new CKD-EPI formula on (AU)
Assuntos
Humanos , Insuficiência Renal Crônica/fisiopatologia , Taxa de Filtração Glomerular , Fatores de Risco , Fatores Etários , Creatinina/sangue , Creatinina/urina , Testes de Função RenalRESUMO
INTRODUCTION: A recent report by the CKD-EPI Chronic Kidney Disease Epidemiology Collaboration) group describes a new equation to estimate the glomerular filtration rate (GFR). This equation has been developed from a population of 8,254 subjects who had the GFR measured by iothalamate clearance (mean 68 mL/min/1.73 m2, SD 40 mL/min/1.73 m2). It includes variables such as serum creatinine, age, sex and race with different formula according to race, sex and creatinine value. The CKD-EPI equation improved the accuracy and precision results of the current first-choice MDRD-IDMS (Modification of Diet in Renal Disease-Isotopic Dilution Mass Spectrometry) formula, specially for GFR > 60 mL/min/1.73 m2 in a group of 3,896 subjects. METHODS: The goal of our study was to compare the estimated GFR by using the new equation CKD-EPI with MDRD-IDMS in a wide cohort of 14,427 patients (5,234 women and 9,193 men), and to analyze the impact of the new CKD-EPI formula on the staging of patients with CKD. RESULTS: Mean estimated GFR was 0.6 mL/min/1.73 m2 higher with CKD-EPI as compared to MDRD-IDMS for the whole group, 1.9 mL/min/1.73 m2 higher for women and 0.2 mL/min/1.73 m2 lower for men. The percentage of CKD staging concordancy between equations varied from 79.4 % for stage 3A and 98.6% for stage 5. For those patients younger than 70 years, 18.9 % and 24 % MDRD-IDMS stages 3B and 3A were reclassified as CKD 3A and 2 by CKD-EPI, respectively. For the same stages in the group younger than 70 years, the percentage of reclassified patients increased up to 34.4% and 33.4%, respectively. CONCLUSION: The new CKD-EPI equation to estimate the GFR reclassifies an important number of patients to higher CKD stages (higher GFR), specially younger women, classified as CKD stage 3 by MDRD-IDMS.
