Comparison of two different methods for CA19-9 antigen determination

BACKGROUND: This study was designed to investigate the clinical performance of the Access GI Monitor (Beckman Coulter) on the UniCel DxI 800, a method for CA19-9 antigen determination, and to compare with CA19-9 assay on the AxSYM system (Abbott). - METHODS: 1,063 serum samples from unselected patie...

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Hauptverfasser: Deinzer, Martina (VerfasserIn) , Faißner, Ralf (VerfasserIn) , Metzger, Tobias (VerfasserIn) , Kaminski, Wolfgang E. (VerfasserIn) , Löhr, J.-Matthias (VerfasserIn) , Neumaier, Michael (VerfasserIn) , Brinkmann, Thomas (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2010
In: Clinical laboratory
Year: 2010, Jahrgang: 56, Heft: 7/8, Pages: 319-325
Online-Zugang: Volltext
Verfasserangaben:Martina Deinzer, Ralf Faissner, Tobias Metzger, Wolfgang E. Kaminski, Mathias Löhr, Michael Neumaier, Thomas Brinkmann

MARC

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245 1 0 |a Comparison of two different methods for CA19-9 antigen determination  |c Martina Deinzer, Ralf Faissner, Tobias Metzger, Wolfgang E. Kaminski, Mathias Löhr, Michael Neumaier, Thomas Brinkmann 
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500 |a Matthias Löhr ist in der Verfasserangabe fälschlich als "Mathias Löhr" geschrieben 
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500 |a Gesehen am 27.10.2023 
520 |a BACKGROUND: This study was designed to investigate the clinical performance of the Access GI Monitor (Beckman Coulter) on the UniCel DxI 800, a method for CA19-9 antigen determination, and to compare with CA19-9 assay on the AxSYM system (Abbott). - METHODS: 1,063 serum samples from unselected patients with different underlying diagnoses were tested with both methods. Passing-Bablok regression analysis and Bland Altman analysis was performed. In addition, using ROC analysis, the distribution of Access GI Monitor and AxSYM CA19-9 antigen levels was tested in patients with pancreatic cancer (n = 50), acute inflammatory disease (n = 20), and with chronic inflammation of the pancreatic gland (n = 18). Furthermore, four patients with pancreatic cancer were monitored individually in their courses of the disease (before, during, and after therapeutic procedures) to compare their CA19-9 values with regard to inter-method concordance. - RESULTS: Passing-Bablok analysis showed a systematic difference with R = 0.93, slope 0.75, and intercept -1.0. Bland Altman analysis showed a wide scatter of relative differences between both methods, especially in the low end measuring range. In the selected group of patients with pancreatic diseases the analysis of concordance revealed 95.5 % agreement between both methods with a comparable area under the ROC curves (0.73 vs. 0.76). A clear concordance was found for all four selected patients. - CONCLUSIONS: Although we found significant systematic measuring variations in the global analysis, the two different automated methods for the quantitative determination of CA19-9 antigen were comparable with respect to their clinical accuracy and applicability to support decision making in the management of pancreatic cancer. 
650 4 |a Humans 
650 4 |a Reproducibility of Results 
650 4 |a Pancreatic Neoplasms 
650 4 |a Antibodies, Monoclonal 
650 4 |a Pancreatitis 
650 4 |a CA-19-9 Antigen 
650 4 |a Immunoassay 
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700 1 |a Metzger, Tobias  |e VerfasserIn  |4 aut 
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