1. ABO Blood Groups and Incidence of COVID-19 in the Mass Gathering Events in Borriana (Spain), March 2020: A Retrospective Cohort Study.
- Author
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Domènech-Montoliu S, Puig-Barberà J, Guerra-Murcia O, Pac-Sa MR, Orrico-Sanchéz A, Gómez-Lanas L, Sala-Trull D, Domènech-Leon C, Del Rio-González A, Sánchez-Urbano M, Satorres-Martinez P, Latorre-Poveda M, Ferrando-Rubert S, Aparisi-Esteve L, Badenes-Marques G, Blasco-Gari R, Casanova-Suarez J, Fontal-Carcel M, Gil-Fortuño M, Hernández-Pérez N, Jovani-Sales D, López-Diago L, Notari-Rodríguez C, Pérez-Olaso O, Romeu-Garcia MA, Ruíz-Puig R, and Arnedo-Pena A
- Abstract
Our objective was to estimate the incidence of COVID-19 and the ABO blood Groups in the mass-gathering events (MGEs) during the Falles Festival in Borriana (Spain) from 6-10 March 2020. We conducted a population-based retrospective cohort study and measured anti-SARS-CoV-2 antibodies and the ABO of participants. We performed laboratory COVID-19 tests and obtained the ABO in 775 subjects (72.8% of the original exposed cohort): O-group (45.2%), A-group (43.1%), B-group (8.5%) and AB-group (3.4%). Adjusted for confounding factors, including COVID-19 exposure during the MGEs, attack rates of COVID-19 for each ABO group were 55.4%, 59.6%, 60.2%, and 63.7%. The adjusted relative risks were for O-group 0.93 (95% Confidence Interval [CI] 0.83-1.04), for A-group 1.06 (95% CI 0.94-1.18), for B-group 1.04 (95%CI 0.88-1.24), and for AB-group 1.11 (95% CI 0.81-1.51) with no significant differences. Conclusions: Our results suggest no effect of ABO on COVID-19 incidence. We observed weak but not significant protection of the O-group and not a significantly greater infection risk for the remaining groups compared with the O-group. More studies are needed to resolve the controversies regarding the association between ABO and COVID-19.
- Published
- 2023
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