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Indian Journal of Clinical Biochemistry

, Volume 25, Issue 4, pp 380–384 | Cite as

Underestimation of Impaired Kidney Function with Serum Creatinine

  • M. Kannapiran
  • D. Nisha
  • A. Madhusudhana RaoEmail author
Original Article

Abstract

Serum creatinine (SCr) levels are frequently used as a screening test to assess impaired renal function; however, patients can have significantly decreased glomerular filtration rate (GFR) with normal SCr values and making the recognition of kidney dysfunction more difficult. Hence, this study was designed to determine the extent of misclassification of the patients who have significantly reduced GFR as calculated by reexpressed four variable modification of diet in renal disease (MDRD) equation but, normal range of SCr. The study included 1040 in and out patients referred by physicians for serum creatinine measurement. When an exclusion criterion was applied 928 patients were qualified for the study. SCr was measured in 928 patients by a Roche kinetic compensated Jaffe’s assay. GFR was calculated using reexpressed four variable MDRD study equation. Of the 928 patients 270 (29.1%) had renal dysfunction on the basis of eGFR (<60 ml/min/1.73 m2). However, with SCr only 162 (17.5%) patients had abnormal renal function (>1.5 mg/dl) and SCr values misrepresented (108) 11.6% patients with impaired kidney function. In addition, more females, about 15% were failed to detect by SCr method in contrast to males of 9%. This study documented that, a large proportion of patients with impaired renal function are not diagnosed if clinicians rely solely on normal SCr as evidence of normal renal function. Inclusion of eGFR calculated by re-expressed 4 variable MDRD equation may facilitates the early identification and intervention of patients with renal impairment.

Keywords

Serum creatinine Renal failure eGFR MDRD Jaffe’s assay 

Notes

Conflict of interest

None.

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Copyright information

© Association of Clinical Biochemists of India 2010

Authors and Affiliations

  1. 1.Department of BiochemistryPSG Institute of Medical Sciences and ResearchPeelamedu, CoimbatoreIndia

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