Cited by 42Clinical Laboratory Practices and Quality ControlAdrenal Hormones and DisordersStress Responses and Cortisol

Performance characteristics of five automated serum cortisol immunoassays

Roberts, Richard F, Roberts, William L·2004·Clinical Biochemistry

Abstract

Background Serum cortisol measurements are used to help diagnose conditions of cortisol deficiency and excess. Automated, nonisotopic immunoassays are used in most clinical laboratories.Methods Linearity, imprecision, and method comparison studies for serum cortisol assays were performed with the Access, Advia Centaur, AxSYM, Elecsys 2010, and IMMULITE 2000 analyzers.Results All methods demonstrated acceptable linearity with the AxSYM method showing the least deviation from target values. The Elecsys 2010 method was the most precise for all three levels of quality control material. Method comparison studies demonstrated good concordance among methods except for two patient samples that gave results on the Elecsys 2010 that were significantly higher than the other methods. Differences in assay calibration were observed.Conclusions Overall, all methods performed well. Additional calibration standardization efforts are required to truly harmonize the results from each assay. The Elecsys 2010 method is less specific than other automated methods based on two discordant patient results.

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Crossref · 10.1016/j.clinbiochem.2004.01.009

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Authors
Roberts, R. F., & Roberts, W. L.
Affiliations
  • ARUP Institute for Clinical and Experimental Pathology (US)
  • University of Utah (US)
Corresponding author
Roberts, Richard F
Venue
Clinical Biochemistry
Publisher
Elsevier BV
Published
2004-06
Volume
37
Issue
6
Pages
489-493
ISSN
0009-9120 (ISSN-L)
OpenAlex
W2032213551
Cited by
42
References
11
Citations by year
2025: 1 · 2024: 1 · 2023: 1 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 3 · 2018: 3 · 2017: 3 · 2016: 3 · 2015: 2 · 2014: 1 · 2013: 3 · 2012: 3
FWCI
1.23
Type
journal article
Language
en
Open access
closed
Locations
  • Clinical Biochemistry (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Clinical Laboratory Practices and Quality Control
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
serum cortisol, automated immunoassay, assay performance, method comparison, assay linearity, imprecision, assay calibration, Immulite 2000, ADVIA Centaur, AxSYM, assay harmonization, assay specificity
MeSH terms
Autoanalysis, Calibration, Humans, Hydrocortisone, Immunoassay, Reproducibility of Results, Clinical Laboratory Techniques

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