biostudies-literatureMurakami MThe Nippon Foundation - Osaka Universitye067591https://www.ebi.ac.uk/biostudies/studies/S-EPMC9895918biostudies-literatureUnknown13(1)<h4>Objectives</h4>Rapid antigen tests have been used to prevent the spread of the COVID-19; however, there have been concerns about their decreased sensitivity to the Omicron variant. In this study, we assessed the sensitivity and specificity of the rapid antigen test compared with the PCR test among the players and staff members of the Japan Professional Football League and clubs. Furthermore, we evaluated the relationship between the sensitivity and the duration from the onset of symptoms to testing or vaccine status.<h4>Design</h4>This was a retrospective observational study.<h4>Methods</h4>We used 656 results from both the rapid antigen and PCR tests for COVID-19 using samples collected on the same day from 12 January to 2 March 2022, during the Omicron variant outbreak in Japan.<h4>RBMJ openSensitivity of rapid antigen tests for COVID-19 during the Omicron variant outbreak among players and staff members of the Japan Professional Football League and clubs: a retrospective observational study.PMC9895918N/A (Project for Infectious Disease Prevention)Irie TKamo MYasutaka TImoto SNaito WMurakami MSato HfalseSensitivity of rapid antigen tests for COVID-19 during the Omicron variant outbreak among players and staff members of the Japan Professional Football League and clubs: a retrospective observational study.<h4>Objectives</h4>Rapid antigen tests have been used to prevent the spread of the COVID-19; however, there have been concerns about their decreased sensitivity to the Omicron variant. In this study, we assessed the sensitivity and specificity of the rapid antigen test compared with the PCR test among the players and staff members of the Japan Professional Football League and clubs. Furthermore, we evaluated the relationship between the sensitivity and the duration from the onset of symptoms to testing or vaccine status.<h4>Design</h4>This was a retrospective observational study.<h4>Methods</h4>We used 656 results from both the rapid antigen and PCR tests for COVID-19 using samples collected on the same day from 12 January to 2 March 2022, during the Omicron variant outbreak in Japan.<h4>R2023-01-01T00:00:00Z2023 Jan2025-04-22T09:33:52.508Z2024-12-04T12:14:23.613ZS-EPMC98959183671714110.1136/bmjopen-2022-067591