• Croatian medical journal · Oct 2021

    Diagnostic validation of two SARS-CoV-2 immunochromatographic tests in Slovenian and Croatian hospitals.

    • Martina Ifko, Željka Tkalčić Švabek, Iva Friščić, Mirjana Mariana Kardum Paro, Ingrid Prkačin, Lovorka Đerek, Ana Livun, and Miha Skvarč.
    • Martina Ifko, Ulica Roberta Hvalca 2, 2000 Maribor, Slovenia, martina.ifko@gmail.com.
    • Croat. Med. J. 2021 Oct 31; 62 (5): 513517513-517.

    AimTo diagnostically validate two point-of-care (POC) rapid antigen tests for SARS-CoV-2 by comparing their results with those of laboratory-based real-time polymerase chain reaction tests (RT-PCR).MethodsThe study enrolled 455 patients from two Slovenian and two Croatian hospitals. The NADAL COVID-19 Ag Test (Nal von Minden, Moers, Germany) and ALLTEST COVID-19 Antigen Test (Hangzhou ALLTEST Biotech Co., Ltd, Hangzhou, China) were diagnostically validated in emergency care departments of two Slovenian hospitals, while only ALLTEST COVID-19 Antigen Test was validated in two Croatian hospitals.ResultsThe antigen test results were in very good agreement with the RT-PCR results (Cohen's Kappa between 0.747 and 0.891 for the NADAL COVID-19 and between 0.820 and 0.954 for the ALLTEST COVID-19). The NADAL COVID-19 Ag Test had the sensitivity between 66.67% and 92.31%, with a negative predictive value between 85.51% and 99.2%. The ALLTEST COVID-19 Antigen Test had the sensitivity between 81.39% and 91.11%, with a negative predictive value between 85.45% and 98.78%.ConclusionThe antigen tests are practical and reliable screening assays for SARS CoV-2 in emergency care departments. Both antigen tests can be used as screening tests to reduce the number of patients waiting for RT-PCR results. Even more, they can be used to quickly isolate COVID-19 patients and reduce hospital transmissions.

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