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Critical appraisal and meta-analysis of biological variation estimates for kidney related analytes

Jonker, Niels; Aslan, Berna; Boned, Beatriz; Marqués-García, Fernando; Ricos, Carmen; Alvarez, Virtudes; Bartlett, William A.; Braga, Federica; Carobene, Anna; Coşkun, Abdurrahman; Díaz-Garzón, Jorge; Fernandez-Calle, Pilar; Gonzalez-Lao, Elisabet; Minchinela, Joana; Perich, Carmen; Simón, Margarita; Sandberg, Sverre; Aarsand, Aasne Karine
Journal article, Peer reviewed
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URI
https://hdl.handle.net/11250/2764162
Date
2020
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  • Department of Global Public Health and Primary Care [2533]
  • Registrations from Cristin [5462]
Original version
Clinical Chemistry and Laboratory Medicine. 2020.   10.1515/cclm-2020-1168
Abstract
Objective: Kidney markers are some of the most frequently used laboratory tests in patient care, and correct clinical decision making depends upon knowledge and correct application of biological variation (BV) data. The aim of this study was to review available BV data and to provide updated BV estimates for the following kidney markers in serum and plasma; albumin, creatinine, cystatin C, chloride, potassium, sodium and urea.

Content: Relevant studies were identified from a historical BV database as well as by systematic literature searches. Retrieved publications were appraised by the Biological Variation Data Critical Appraisal Checklist (BIVAC). Meta-analyses of BIVAC compliant studies with similar design were performed to deliver global estimates of within-subject (CVI) and between-subject (CVG) BV estimates. Out of the 61 identified papers, three received a BIVAC grade A, four grade B, 48 grade C, five grade D grade and one was not appraised as it did not report numerical BV estimates. Most studies were identified for creatinine (n=48). BV estimates derived from the meta-analysis were in general lower than previously reported estimates for all analytes except urea. For some measurands, BV estimates may be influenced by age or states of health, but further data are required.

Summary: This review provides updated global BV estimates for kidney related measurands. For all measurands except for urea, these estimates were lower than previously reported.

Outlook: For the measurands analyzed in this review, there are sufficient well-designed studies available to publish a trustworthy estimate of BV. However, for a number of newly appearing kidney markers no suitable data is available and additional studies are required.
Description
Postponed access: the file will be available after 2021-10-03
Publisher
De Gruyter
Journal
Clinical Chemistry and Laboratory Medicine
Copyright
Copyright 2020 Walter de Gruyter GmbH

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