{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T22:45:08Z","timestamp":1784760308450,"version":"3.55.0"},"reference-count":67,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2021,9,24]],"date-time":"2021-09-24T00:00:00Z","timestamp":1632441600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>After a COVID-19 outbreak in the Falles festival of Borriana (Spain) during March 2020, a cohort of patients were followed until October 2020 to estimate complications post-COVID-19, considering ABO blood groups (ABO). From 536 laboratory-confirmed cases, 483 completed the study (90.1%) carried by the Public Health Center of Castell\u00f3 and the Emergency and Microbiology and Clinical Analysis of Hospital de la Plana Vila-real. The study included ABO determination and telephone interviews of patients. The participants had a mean age of 37.2 \u00b1 17.1 years, 300 females (62.1%). ABO were O (41.4%), A (45.5%), B (9.1%), and AB (3.9%). We found no difference in the incidence of COVID-19 infections. A total of 159 (32.9%) patients reported one or more post-COVID-19 complications with divergent incidences after adjustment: O (32.3%), A (32.6%), B (54.1%), and AB (27.6%); B groups had more complications post-COVID-19 when compared with O group (adjusted relative risk [aRR] 95% confidence interval [CI] 1.68, 95% CI 1.24\u20132.27), and symptoms of fatigue (1.79, 95% CI 1.08\u20132.95), myalgia (2.06, 95% CI 1.10\u20133.84), headache (2.61, 95% CI 1.58\u20134.31), and disorder of vision (4.26 95% CI 1.33\u201313.60). In conclusion, we observed significant differences in post-COVID-19 complications by ABO, with a higher incidence in B group. Additional research is justified to confirm our results.<\/jats:p>","DOI":"10.3390\/ijerph181910039","type":"journal-article","created":{"date-parts":[[2021,9,24]],"date-time":"2021-09-24T20:15:32Z","timestamp":1632514532000},"page":"10039","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["ABO Blood Groups and the Incidence of Complications in COVID-19 Patients: A Population-Based Prospective Cohort Study"],"prefix":"10.3390","volume":"18","author":[{"given":"Salvador","family":"Dom\u00e8nech-Montoliu","sequence":"first","affiliation":[{"name":"Emergency Service Hospital de la Plana, Health Department 3, 12540 Vila-Real, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5783-0409","authenticated-orcid":false,"given":"Joan","family":"Puig-Barber\u00e0","sequence":"additional","affiliation":[{"name":"Vaccines Research Area FISABIO, 46020 Valencia, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria Rosario","family":"Pac-Sa","sequence":"additional","affiliation":[{"name":"Public Health Center, Health Department 2, 12003 Castello de la Plana, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paula","family":"Vidal-Utrillas","sequence":"additional","affiliation":[{"name":"Health Centers I and II, Health Department 2, 12530 Borriana, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marta","family":"Latorre-Poveda","sequence":"additional","affiliation":[{"name":"Emergency Service Hospital de la Plana, Health Department 3, 12540 Vila-Real, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alba Del","family":"Rio-Gonz\u00e1lez","sequence":"additional","affiliation":[{"name":"Health Centers I and II, Health Department 2, 12530 Borriana, 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Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria","family":"Fontal-Carcel","sequence":"additional","affiliation":[{"name":"Health Center, Health Department 3, 12600 La Vall d\u2019Uix\u00f3, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lorna","family":"Gomez-Lanas","sequence":"additional","affiliation":[{"name":"Emergency Service Hospital de la Plana, Health Department 3, 12540 Vila-Real, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2378-3445","authenticated-orcid":false,"given":"David","family":"Jovani-Sales","sequence":"additional","affiliation":[{"name":"Emergency Service Hospital de la Plana, Health Department 3, 12540 Vila-Real, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria Carmen","family":"Le\u00f3n-Domingo","sequence":"additional","affiliation":[{"name":"Villa F\u00e1tima School, Health Department 3, 12530 Borriana, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria Dolores","family":"Llopico-Vilanova","sequence":"additional","affiliation":[{"name":"Emergency Service Hospital de la Plana, Health Department 3, 12540 Vila-Real, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mercedes","family":"Moros-Blasco","sequence":"additional","affiliation":[{"name":"Carinyena Health Center, 12540 Vila-Real, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cristina","family":"Notari-Rodr\u00edguez","sequence":"additional","affiliation":[{"name":"Health Center, Health Department 3, 12200 Onda, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Raquel","family":"Ru\u00edz-Puig","sequence":"additional","affiliation":[{"name":"Emergency Service Hospital de la Plana, Health Department 3, 12540 Vila-Real, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sonia","family":"Valls-L\u00f3pez","sequence":"additional","affiliation":[{"name":"Emergency Service Hospital de la Plana, Health Department 3, 12540 Vila-Real, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1071-0984","authenticated-orcid":false,"given":"Alberto","family":"Arnedo-Pena","sequence":"additional","affiliation":[{"name":"Public Health Center, Health Department 2, 12003 Castello de la Plana, Spain"},{"name":"Department of Health Science, Public University Navarra, 31008 Pamplona, Spain"},{"name":"Epidemiology and Public Health (CIBERESP), 28029 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,9,24]]},"reference":[{"key":"ref_1","first-page":"1410768211032850","article-title":"Symptoms, complications and management of long COVID: A 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