the mayo clinic recently published a newsletter stating men over 70 should not take serum creatinine/gfr.they stated it is unreliable in men over 70.if thats true what is best test for people over 70 to evaluate kidney function


Thanks for asking my opinion on "Allexperts".

In my opinion, serum creatinine is still a good screening tool.

The best way to estimate GFR is by radionuclide scans. The other option is to do a 24 hour urinary creatinine clearance. However, both these methods are cumbersome and not easy to carry out. Serum creatinine values can be plugged into various equations like the MDRD GFR calculator or the CKD-EPI calculator to find out kidney function in terms of GFR.


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Dr. Shamik Shah, MD, DNB (Nephrology), ISN Fellow


I can answer all questions related to kidney diseases, hypertension, plasmapheresis and kidney transplantation. I am an Indian-Board certified Nephrologist. I was a post-Doctoral Scholar at the Division of Nephrology & Hypertension,Department of Medicine, University of California, San Diego. My area of interest is Critical care Nephrology and Acute Kidney Injury.

Please mention the units in which your lab results were reported and the normal reference range for your laboratory.

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Ten years as a Critical Care & Transplant Nephrologist

International Society of Nephrology
Indian Society of Nephrology
Indian Medical Association
European Renal Association

- Shah SH, Cerda J. Acute Tubular Necrosis; Lerma, Edgar V., Rosner, Mitchell eds. Clinical Decisions in Nephrology, Hypertension and Kidney Transplantation. Springer ISBN 978-1-4614-4453-4, pp. 191-198
- Shah SH, Cerda J. Management of Acute Kidney Injury; Lerma, Edgar V., Rosner, Mitchell eds. Clinical Decisions in Nephrology, Hypertension and Kidney Transplantation. Springer ISBN 978-1-4614-4453-4
- Cerda J, Tolwani A, Shah SH, Ronco C. Continuous Renal Replacement Therapies in Modeling and Control of Dialysis Systems edited by Azar AT, Springer-Verlag, Heidelberg, Germany (In Press)
- Shah SH, Cerda J, Kellum JA. Acute Kidney Injury in Special Circumstances. John Kellum, Jorge Cerda, eds. Renal and Metabolic Disorders, Oxford University Press (In press)
- Shah SH, Mehta RL. “Anticoagulation in CRRT: Is Citrate better?”; Vineet Nayyar Ed. Critical Care Update 2009, Jaypee Brothers (In press)
- Shah SH, Mehta RL. “Non-dialytic management of acute kidney disease”; Evidence based Nephrology, BMJ, (In press)
- Shah SH, Mehta RL. “Epidemiology of Community-acquired AKI”; Ronco C, Bellomo R, Kellum J Eds. Critical Care Nephrology, Saunders. ISBN 1-4160-4252-0
- Abdeen O, Shah SH, Mehta RL; “Dialysis therapies in the surgical intensive care unit”; William Wilson, Christopher Grande, David Hoyt Eds. Trauma: Resuscitation, Anesthesia, and Critical Care, Informa Healthcare, NY 2007. ISBN 0-8247-2920-X
- Shah SH, Mehta RL. Acute kidney injury in critical care: time for a paradigm shift? Curr Opin Nephrol Hypertens. 2006 Nov;15(6):561-5.
- Shah, SH, Soroko S, Lischer E, Mehta RL. Delivered vs. Prescribed dose of Dialysis in Hospitalized Patients: Results of an Audit. J Am Soc Nephrol 17(Abstracts Issue): 2006, 107A.
- Shah SH et al “Biochemical Nutritional Parameters in Non-vegetarian and Vegetarian CAPD patients” Perit Dial Int 2001; 21 Suppl 2: S1-182

MBBS, MD (Internal Medicine), Diplomate of National board (Nephrology), ISN Fellow

Awards and Honors
Educational Ambassador of the International Society of Nephrology 2010
Fellowship of the International Society of Nephrology 2005.
Young Investigator Award by the International Society of Peritoneal Dialysis 2001

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