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Estimation of glomerular filtration rate based on the modification of diet in renal disease equation in patients with chronic renal failure.
Kidney Blood Press Res. 2005; 28(2):63-7.KB

Abstract

The list of indications for initiating regular dialysis treatment includes residual glomerular filtration rate (GFR). Under the current European Best Practice Guidelines for Hemodialysis, residual GFR (and the presence of one or more symptoms of uremia) should not decrease below 15 ml/min. The present article seeks to determine to what extent the modification of diet in renal disease (MDRD) equation enables the detection of this decrease in GFR. We tried to answer this question using a more detailed analysis of the relationship between MDRD and renal inulin clearance (C in). Residual GFR based on C in (under conditions of stable plasma levels and water loading) and GFR calculated using the MDRD equation was measured in 79 individuals with chronic renal failure (with mean C in = 19.1 +/- 10.1 ml/min/1.73 m2). Statistical evaluation was performed using regression analysis, the interchangeability of both methods (Bland-Altman) and receiver-operating characteristic (ROC) curve analysis. Regression analysis demonstrated a significant correlation between MDRD and C in (r = 0.892; p < 0.001). However, the regression equation line for the correlation differs significantly from the identity line (p < 0.001). The value of the regression coefficient (0.722) is significantly lower than 1.0 (CI50 0.63; 0.81). The mean MDRD -C in difference was 3.26 +/- 4.46 ml/min/1.73 m2 and the value was significantly different from zero (p < 0.001). The mean difference +2 SD was 12.2 ml/min/1.73 m2, and the mean - 2 SD was -5.7 ml/min/1.73 m2. ROC curve analysis (for a cutoff C in = 15 ml/min/1.73 m2) indicates an area under the curve (AUC) of 0.954 +/- 0.023. The best combination of sensitivity and specificity was obtained for a MDRD of 19.7 ml/min/1.73 m2, with a sensitivity of 90.5% and specificity of 87.5%. For cutoff value of C in = 10 ml/min/1.73 m2, the AUC was 0.939 +/- 0.026 (CI95 0.863-0.890). A combination of maximum sensitivity and specificity was obtained with an MDRD of 16.5 ml/min/1.73 m2. With this value, MDRD sensitivity was 100% and specificity 81.5%. A significant correlation between the MDRD equation and the measured creatinine clearance (C cr) was found (r = 0.883, p < 0.001). The mean difference of MDRD-C cr was -7.2 +/- 6.5 ml/min/1.73 m2. This is significantly different from that of MDRD-C in (p < 0.001). Our results suggest that MDRD and C in in individuals with chronic renal failure are not interchangeable methods for a GFR <15 ml/min/1.73 m2 determination. However, MDRD may furnish valuable information in terms of detecting a critical decrease in GFR; but, the MDRD equation for this decrease in GFR (15 ml/min/1.73 m2) will provide a somewhat higher value (19.7 ml/min/1.73 m2).

Authors+Show Affiliations

Institute for Clinical and Experimental Medicine, Prague, Czech Republic. otsc@medicon.czNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15640609

Citation

Schuck, Otto, et al. "Estimation of Glomerular Filtration Rate Based On the Modification of Diet in Renal Disease Equation in Patients With Chronic Renal Failure." Kidney & Blood Pressure Research, vol. 28, no. 2, 2005, pp. 63-7.
Schuck O, Teplan V, Marecková O, et al. Estimation of glomerular filtration rate based on the modification of diet in renal disease equation in patients with chronic renal failure. Kidney Blood Press Res. 2005;28(2):63-7.
Schuck, O., Teplan, V., Marecková, O., Skibová, J., & Stollová, M. (2005). Estimation of glomerular filtration rate based on the modification of diet in renal disease equation in patients with chronic renal failure. Kidney & Blood Pressure Research, 28(2), 63-7.
Schuck O, et al. Estimation of Glomerular Filtration Rate Based On the Modification of Diet in Renal Disease Equation in Patients With Chronic Renal Failure. Kidney Blood Press Res. 2005;28(2):63-7. PubMed PMID: 15640609.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Estimation of glomerular filtration rate based on the modification of diet in renal disease equation in patients with chronic renal failure. AU - Schuck,Otto, AU - Teplan,Vladimír, AU - Marecková,Olga, AU - Skibová,Jelena, AU - Stollová,Milena, Y1 - 2005/01/07/ PY - 2004/11/01/accepted PY - 2005/1/11/pubmed PY - 2005/7/26/medline PY - 2005/1/11/entrez SP - 63 EP - 7 JF - Kidney & blood pressure research JO - Kidney Blood Press Res VL - 28 IS - 2 N2 - The list of indications for initiating regular dialysis treatment includes residual glomerular filtration rate (GFR). Under the current European Best Practice Guidelines for Hemodialysis, residual GFR (and the presence of one or more symptoms of uremia) should not decrease below 15 ml/min. The present article seeks to determine to what extent the modification of diet in renal disease (MDRD) equation enables the detection of this decrease in GFR. We tried to answer this question using a more detailed analysis of the relationship between MDRD and renal inulin clearance (C in). Residual GFR based on C in (under conditions of stable plasma levels and water loading) and GFR calculated using the MDRD equation was measured in 79 individuals with chronic renal failure (with mean C in = 19.1 +/- 10.1 ml/min/1.73 m2). Statistical evaluation was performed using regression analysis, the interchangeability of both methods (Bland-Altman) and receiver-operating characteristic (ROC) curve analysis. Regression analysis demonstrated a significant correlation between MDRD and C in (r = 0.892; p < 0.001). However, the regression equation line for the correlation differs significantly from the identity line (p < 0.001). The value of the regression coefficient (0.722) is significantly lower than 1.0 (CI50 0.63; 0.81). The mean MDRD -C in difference was 3.26 +/- 4.46 ml/min/1.73 m2 and the value was significantly different from zero (p < 0.001). The mean difference +2 SD was 12.2 ml/min/1.73 m2, and the mean - 2 SD was -5.7 ml/min/1.73 m2. ROC curve analysis (for a cutoff C in = 15 ml/min/1.73 m2) indicates an area under the curve (AUC) of 0.954 +/- 0.023. The best combination of sensitivity and specificity was obtained for a MDRD of 19.7 ml/min/1.73 m2, with a sensitivity of 90.5% and specificity of 87.5%. For cutoff value of C in = 10 ml/min/1.73 m2, the AUC was 0.939 +/- 0.026 (CI95 0.863-0.890). A combination of maximum sensitivity and specificity was obtained with an MDRD of 16.5 ml/min/1.73 m2. With this value, MDRD sensitivity was 100% and specificity 81.5%. A significant correlation between the MDRD equation and the measured creatinine clearance (C cr) was found (r = 0.883, p < 0.001). The mean difference of MDRD-C cr was -7.2 +/- 6.5 ml/min/1.73 m2. This is significantly different from that of MDRD-C in (p < 0.001). Our results suggest that MDRD and C in in individuals with chronic renal failure are not interchangeable methods for a GFR <15 ml/min/1.73 m2 determination. However, MDRD may furnish valuable information in terms of detecting a critical decrease in GFR; but, the MDRD equation for this decrease in GFR (15 ml/min/1.73 m2) will provide a somewhat higher value (19.7 ml/min/1.73 m2). SN - 1420-4096 UR - https://www.unboundmedicine.com/medline/citation/15640609/Estimation_of_glomerular_filtration_rate_based_on_the_modification_of_diet_in_renal_disease_equation_in_patients_with_chronic_renal_failure_ L2 - https://www.karger.com?DOI=10.1159/000083238 DB - PRIME DP - Unbound Medicine ER -