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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 / Lackner, Karl J. / Lippi, Giuseppe / Melichar, Bohuslav / Payne, Deborah A. / Schlattmann, Peter / Tate, Jillian R.

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IMPACT FACTOR 2016: 3.432

CiteScore 2016: 2.21

SCImago Journal Rank (SJR) 2016: 1.000
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Volume 40, Issue 11 (Dec 2002)


Diagnostic Efficiency of Cystatin C and Serum Creatinine as Markers of Reduced Glomerular Filtration Rate in the Elderly

Heinrich Burkhardt / Gero Bojarsky / Rainer Gladisch
Published Online: 2005-06-01 | DOI: https://doi.org/10.1515/cclm.2002.199


This is a secondary analysis of data from a cross-sectional study to evaluate the diagnostic efficiency of cystatin C as a marker of the glomerular filtration rate in the elderly. Thirty patients (15 male, 15 female, mean age 75.4±7.1 years) attending a geriatric ward were enrolled. Exclusion criteria were previously diagnosed renal disease, dementia and heart failure (NYHA III or IV). Cystatin C in serum was determined by a particle-enhanced turbidimetric assay. Inulin clearance was assessed using a single-shot method. Also, Cockcroft-Gault formula was calculated. Twelve patients had a reduced glomerular filtration rate (<70 ml/min/1.73m2). The mean values were 88.4 μmol/l (±27.7) for serum creatinine, 1.57 mg/l (±0.34) for cystatin C and 88.7 ml/min/1.73 m2 (±34.6) for inulin clearance. Maximum efficiency was 0.73 for serum creatinine (cut-off limit 82 μmol/l), 0.67 for cystatin C (cut-off limit 1.63 mg/l) and 0.8 for Cockcroft and Gault estimation (cut-off limit 54 ml/min/1.73 m2). A receiver operating characteristics (ROC) analysis did not show any differences between the various methods. Therefore, cystatin C in serum may not improve the diagnostic efficiency in detecting a reduced glomerular filtration rate in the elderly. Furthermore, normal ranges for serum creatinine in the elderly might need to be adjusted.

About the article

Published Online: 2005-06-01

Published in Print: 2002-12-02

Citation Information: Clinical Chemistry and Laboratory Medicine, ISSN (Print) 1434-6621, DOI: https://doi.org/10.1515/cclm.2002.199.

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