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The age related association is more pronounced for cystatin C estimated GFR than for creatinine estimated GFR in primary care patients
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Biochemial structure and function. (Klinisk kemi)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Biochemial structure and function. (Klinisk kemi)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Biochemial structure and function. (Klinisk kemi)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Biochemial structure and function. (Klinisk kemi)
2013 (English)In: Clinical Biochemistry, ISSN 0009-9120, E-ISSN 1873-2933, Vol. 46, no 16-17, 1761-1763 p.Article in journal (Refereed) Published
Abstract [en]

Objectives

There is an age associated change in GFR but this association may be influenced by the method used. The aims of the present study were to assess the association between age and cystatin C and creatinine based glomerular filtration rate estimates in primary care patients, and to determine the proportion of patients with clinically important renal impairment.

Materials and methods

1552 samples with simultaneous requests for creatinine and cystatin C from 1552 primary care patients in the county of Uppsala, Sweden were analysed. MDRD, CKD-EPI and cystatin C equations were used to calculate glomerular filtration rate (GFR) and the associations between GFR and age were explored.

Results

The yearly change in cystatin C estimated GFR was 1.24 mL/min/1.73 m2 while the corresponding decline for creatinine estimated GFR was 0.76 mL/min/1.73 m2 for MDRD and 0.99 mL/min/1.73 m2 for CKD-EPI.

Conclusions

The age related association with GFR estimates is smaller for creatinine estimates than for cystatin C estimates. This leads to differences in the number of patients with reduced eGFR detected with the three estimates and the patient treatment will depend on the estimate used. This is not coherent with a good patient care and we thus need to develop new eGFR equations with better agreement between the estimates.

Place, publisher, year, edition, pages
2013. Vol. 46, no 16-17, 1761-1763 p.
National Category
Clinical Laboratory Medicine
Identifiers
URN: urn:nbn:se:uu:diva-206775DOI: 10.1016/j.clinbiochem.2013.07.007ISI: 000326362100028PubMedID: 23872205OAI: oai:DiVA.org:uu-206775DiVA: diva2:645407
Available from: 2013-09-04 Created: 2013-09-04 Last updated: 2017-12-06Bibliographically approved

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Helmersson-Karlqvist, JohannaLarsson, Anders

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