<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-08-29T14:08:04Z</responseDate><request verb="GetRecord" identifier="oai:repisalud.isciii.es:20.500.12105/17188" metadataPrefix="marc">https://repisalud.isciii.es/rest/oai/request</request><GetRecord><record><header><identifier>oai:repisalud.isciii.es:20.500.12105/17188</identifier><datestamp>2025-03-24T16:04:13Z</datestamp><setSpec>com_20.500.12105_2052</setSpec><setSpec>com_20.500.12105_2051</setSpec><setSpec>com_20.500.12105_15322</setSpec><setSpec>col_20.500.12105_19609</setSpec><setSpec>col_20.500.12105_16978</setSpec></header><metadata><record xmlns="http://www.loc.gov/MARC21/slim" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:doc="http://www.lyncode.com/xoai" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/MARC21/slim http://www.loc.gov/standards/marcxml/schema/MARC21slim.xsd">
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      <subfield code="a">Sepulveda-Crespo, Daniel</subfield>
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      <subfield code="a">Treviño-Nakoura, Ana</subfield>
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      <subfield code="a">Bellón, José María</subfield>
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      <subfield code="a">Fernandez-Rodriguez, Amanda</subfield>
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      <subfield code="a">Ryan, Pablo</subfield>
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      <subfield code="a">Martinez, Isidoro</subfield>
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      <subfield code="a">Jimenez-Sousa, Maria Angeles</subfield>
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      <subfield code="a">Resino, Salvador</subfield>
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      <subfield code="c">2023-05</subfield>
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      <subfield code="a">Objectives: Hepatitis C virus (HCV) core antigen (HCVcAg) assay is an alternative for diagnosing HCV infection in a single step. This meta-analysis aimed to evaluate the Abbott ARCHITECT HCV Ag assay's diagnostic performance (validity and utility) for diagnosing active hepatitis C. Methods: PubMed, EMBASE, Scopus, Web of Science, and Cochrane Library were searched until Jan 10, 2023. The protocol was registered at the prospective international register of systematic reviews (PROSPERO: CRD42022337191). Abbott ARCHITECT HCV Ag assay was the test for evaluation, and nucleic acid amplification tests with a cut-off ≤50 IU/mL were the gold standard. Statistical analysis was performed using STATA with the MIDAS module and random-effects models. Results: The bivariate analysis was conducted on 46 studies (18,116 samples). The pooled sensitivity was 0.96 (95%CI=0.94-0.97), specificity 0.99 (95%CI=0.99-1.00), positive likelihood ratio 141.81 (95%CI=72.39-277.79), and negative likelihood ratio 0.04 (95%CI=0.03-0.06). The area under the SROC curve was 1.00 (95%CI= 0.34-1.00). For active hepatitis C prevalence values of 0.1-15%, the probability that a positive test was a true positive was 12-96%, respectively, indicating that a confirmatory test should be necessary, particularly with a prevalence ≤5%. However, the probability that a negative test was a false negative was close to zero, indicating the absence of HCV infection. Conclusions: The validity (accuracy) of the Abbott ARCHITECT HCV Ag assay for screening active HCV infection in serum/plasma samples was excellent. Although the HCVcAg assay showed limited diagnostic utility in low prevalence settings (≤1%), it might help diagnose hepatitis C in high prevalence scenarios (≥5%).</subfield>
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      <subfield code="a">Rev Med Virol. 2023 May;33(3):e2436.</subfield>
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      <subfield code="a">10.1002/rmv.2436</subfield>
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      <subfield code="a">http://hdl.handle.net/20.500.12105/17188</subfield>
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      <subfield code="a">Chronic hepatitis C</subfield>
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      <subfield code="a">Diagnostic performance</subfield>
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      <subfield code="a">HCV core antigen</subfield>
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      <subfield code="a">HCV screening</subfield>
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      <subfield code="a">HCVcAg</subfield>
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      <subfield code="a">Diagnostic performance of hepatitis C core antigen assay to identify active infections: A systematic review and meta-analysis</subfield>
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