Supramolecular PDDA/PEDOT:PSS Biosensor for Early Pancreatic Cancer Detection via CA19-9: Clinical Validation on Human Blood Samples.

ACS Omega · 2026 · PMC12878498 · PMID 41658152

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a decreasing trendno p-value reported

, A decreasing trend in capacitance is observed as the CA19-9 antigen concentration increases from 0.01 to 300 U/mL.

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a clear trendno p-value reported

These findings indicate that the biosensor performs reliably at low to moderate CA19-9 concentrations; although its accuracy declines for samples with elevated biomarker levels, with a clear trend toward underestimation compared to ELISA.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.