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Clinical Chemistry and Laboratory Medicine (CCLM)

Published in Association with the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM)

Editor-in-Chief: Plebani, Mario

Ed. by Gillery, Philippe / Greaves, Ronda / Lackner, Karl J. / Lippi, Giuseppe / Melichar, Bohuslav / Payne, Deborah A. / Schlattmann, Peter

IMPACT FACTOR 2018: 3.638

CiteScore 2018: 2.44

SCImago Journal Rank (SJR) 2018: 1.191
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Volume 43, Issue 11


Impact of standardized calibration on the inter-assay variation of 14 automated assays for the measurement of creatinine in human serum

Sophie Séronie-Vivien / Marie-Madeleine Galteau / Marie-Christine Carlier / Aoumeur Hadj-Aissa / Anne-Marie Hanser / Bernadette Hym / Alain Marchal / Odile Michotey / Claire Pouteil-Noble / Michel Sternberg / Armand Perret-Liaudet / of the Société Française de Biologie Clinique (SFBC) Creatinine Working Group
Published Online: 2005-10-19 | DOI: https://doi.org/10.1515/CCLM.2005.213


Purpose: The aim of our study was to measure the inter-assay variation and accuracy of serum creatinine assays and to assess the effect of standardized calibration procedures on this variability. Methods: We analyzed 30 human sera and three reference materials, using 17 creatinine assays (12 colorimetric, 4 enzymatic and 1 HPLC). We compared two standardized calibration procedures, using either a reference material or secondary standards, to that recommended by the manufacturers. Results: For assays calibrated according to the manufacturers' recommendations, the median inter-assay coefficient of variation (CV) was 14.2% for 20 low samples (45–150μM), and 7.7% for 10 high samples (250–350μM). The CV was significantly influenced by the calibration procedure, but none of the standardized calibration procedures significantly improved the inter-assay variability. However, a significant decrease in CV was noted within each type of assay method (colorimetric or enzymatic) when the standardized calibration used standards of level(s) close to the concentrations to be measured. Only the compensated Jaffe technique and the amido-hydrolase assay showed bias of less than 10%. Conclusions: Standardizing calibration procedures is unlikely to decrease the analytical variability of creatinine assays enough to allow uniform and reliable use of the equations for estimation of glomerular filtration rate.

Keywords: compensated Jaffe technique; creatinine; enzymatic techniques; glomerular filtration rate; inter-laboratory imprecision; Jaffe techniques


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About the article

Corresponding author: Sophie Séronie-Vivien, Department of Clinical Biology, Institut Claudius Regaud, 20-24 rue du Pont St Pierre, 31052 Toulouse Cedex, France Phone: +33-5-61424221, Fax: +33-5-61424631,

Received: 2005-03-26

Accepted: 2005-07-30

Published Online: 2005-10-19

Published in Print: 2005-11-01

Citation Information: Clinical Chemistry and Laboratory Medicine (CCLM), Volume 43, Issue 11, Pages 1227–1233, ISSN (Online) 1437-4331, ISSN (Print) 1434-6621, DOI: https://doi.org/10.1515/CCLM.2005.213.

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