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: | , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2010
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| In: |
Clinical laboratory
Year: 2010, Jahrgang: 56, Heft: 7/8, Pages: 319-325 |
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| 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 |
| 264 | 1 | |c 2010 | |
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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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