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Evaluating real-world data in COVID-19 antigen and PCR testing
International Journal of Clinical Pharmacology and Therapeutics
|January 12, 2023
Summary
COVID-19 testing site performance varied significantly. Pharmacist-led testing showed high accuracy, but confirmation testing is vital for referred positive cases to ensure reliable SARS-CoV-2 detection.
Area of Science:
- Virology
- Public Health
- Clinical Diagnostics
Background:
- COVID-19 testing is crucial for pandemic control.
- Performance of testing sites remains under-researched.
- The Omicron BA.4/BA.5 wave highlighted the need for accurate testing.
Purpose of the Study:
- To evaluate the real-world performance of a pharmacist-led COVID-19 testing center.
- To compare the accuracy of rapid antigen tests and RT-PCR.
- To assess the impact of testing site quality on diagnostic outcomes.
Main Methods:
- Retrospective observational study using real-world data from June 2022.
- Analysis of 7,112 rapid antigen tests and 1,025 RT-PCR tests.
- Inclusion of 233 patients referred for confirmation of positive antigen tests.
Main Results:
- Pharmacist-led antigen tests achieved a positive predictive value (PPV) of 99.6%.
- Referred positive cases from other sites showed a lower PPV of 88.8% for antigen tests.
- Significant differences in testing site performance were observed (p < 0.05).
Conclusions:
- Nucleic acid amplification testing (NAAT) confirmation is essential for current German testing strategies.
- Improved antigen testing standards could potentially reduce the need for NAAT in active infections, enhancing cost-efficiency.
- This study offers novel insights into optimizing COVID-19 testing performance globally.
