{"doi":"10.1016/j.medj.2023.08.005","title":"A multi-country analysis of COVID-19 hospitalizations by vaccination status","abstract":"BACKGROUND: Individuals vaccinated against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), when infected, can still develop disease that requires hospitalization. It remains unclear whether these patients differ from hospitalized unvaccinated patients with regard to presentation, coexisting comorbidities, and outcomes. METHODS: Here, we use data from an international consortium to study this question and assess whether differences between these groups are context specific. Data from 83,163 hospitalized COVID-19 patients (34,843 vaccinated, 48,320 unvaccinated) from 38 countries were analyzed. FINDINGS: While typical symptoms were more often reported in unvaccinated patients, comorbidities, including some associated with worse prognosis in previous studies, were more common in vaccinated patients. Considerable between-country variation in both in-hospital fatality risk and vaccinated-versus-unvaccinated difference in this outcome was observed. CONCLUSIONS: These findings will inform allocation of healthcare resources in future surges as well as design of longer-term international studies to characterize changes in clinical profile of hospitalized COVID-19 patients related to vaccination history. FUNDING: This work was made possible by the UK Foreign, Commonwealth and Development Office and Wellcome (215091/Z/18/Z, 222410/Z/21/Z, 225288/Z/22/Z, and 220757/Z/20/Z); the Bill & Melinda Gates Foundation (OPP1209135); and the philanthropic support of the donors to the University of Oxford's COVID-19 Research Response Fund (0009109). Additional funders are listed in the \"acknowledgments\" section.","journal":"Med","year":2023,"id":373475,"datarank":0.26876392038420827,"base_score":1.791759469228055,"endowment":1.791759469228055,"self_citation_contribution":0.26876392038420827,"citation_network_contribution":0.0,"self_endowment_contribution":0.26876392038420827,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":5,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9288,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2023-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":546770,"name":"Waasila Jassat","orcid":"0000-0003-4279-3056","position":1,"is_corresponding":false},{"id":922602,"name":"Joaquín Baruch","orcid":"0000-0002-0806-3183","position":2,"is_corresponding":false},{"id":922610,"name":"Madiha Hashmi","orcid":"0000-0002-7332-0692","position":3,"is_corresponding":false},{"id":918340,"name":"Amanda Rojek","orcid":"0000-0002-3948-0756","position":4,"is_corresponding":false},{"id":922603,"name":"Abhishek Dasgupta","orcid":"0000-0003-4420-0656","position":5,"is_corresponding":false},{"id":717865,"name":"Ignacio Martín‐Loeches","orcid":"0000-0002-5834-4063","position":6,"is_corresponding":false},{"id":318721,"name":"Luis Felipe Reyes","orcid":"0000-0003-1172-6539","position":7,"is_corresponding":false},{"id":814546,"name":"Chiara Piubelli","orcid":"0000-0002-5739-3795","position":8,"is_corresponding":false},{"id":918341,"name":"Barbara Wanjiru Citarella","orcid":"0000-0001-8968-0708","position":9,"is_corresponding":false},{"id":270854,"name":"Christiana Kartsonaki","orcid":"0000-0002-3981-3418","position":10,"is_corresponding":false},{"id":1134340,"name":"Benjamin Lefèvre","orcid":"0000-0003-0833-0904","position":11,"is_corresponding":false},{"id":1134341,"name":"José W. 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