Abstract
Prazuck et al. evaluated an innovative two-step self-test, the AAZ COVID-VIRO ALL IN ®, switching from the classic nasal swab to a nasal sponge. We notice that the agreement between COVID-VIRO ALL IN ® and RT-PCR was not assessed. Although the authors had evaluated the overall agreement between COVID-VIRO ALL IN ® and RT-PCR, applying overall agreement to evaluate intra-rater consistency is not always appropriate. Our second concern is about the precise number of patients. Thinking the exact number of patients is a prerequisite for statistical analysis, we would be grateful if the authors could explain their data in detail and clarify the misunderstanding.
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