Marin-Gomez, Francesc X.Mendioroz, JacoboMayer, Miguel Ángel, 1960-Méndez-Boo, LeonardoMora, NúriaHermosilla, EduardoComa, ErmengolVilaseca, Josep MariaLeis Machín, Angela 1974-Medina, ManoloMiró Catalina, QueraltVidal Alaball, Josep2022-09-222022-09-222022Marin-Gomez FX, Mendioroz-Peña J, Mayer MA, Méndez-Boo L, Mora N, Hermosilla E, Coma E, Vilaseca JM, Leis A, Medina M, Miró Catalina Q, Vidal-Alaball J. Comparing the clinical characteristics and mortality of residential and non-residential older people with COVID-19: retrospective observational study. Int J Environ Res Public Health. 2022 Jan 2;19(1):483. DOI: 10.3390/ijerph190104831661-7827http://hdl.handle.net/10230/54149Nursing homes have accounted for a significant part of SARS-CoV-2 mortality, causing great social alarm. Using data collected from electronic medical records of 1,319,839 institutionalised and non-institutionalised persons ≥ 65 years, the present study investigated the epidemiology and differential characteristics between these two population groups. Our results showed that the form of presentation of the epidemic outbreak, as well as some risk factors, are different among the elderly institutionalised population with respect to those who are not. In addition to a twenty-fold increase in the rate of adjusted mortality among institutionalised individuals, the peak incidence was delayed by approximately three weeks. Having dementia was shown to be a risk factor for death, and, unlike the non-institutionalised group, neither obesity nor age were shown to be significantly associated with the risk of death among the institutionalised. These differential characteristics should be able to guide the actions to be taken by the health administration in the event of a similar infectious situation among institutionalised elderly people.application/pdfeng© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).info:eu-repo/semantics/articlehttp://dx.doi.org/10.3390/ijerph19010483COVID-19EpidemiologyInstitutionalisationMortalityMultimorbidityNursing homeinfo:eu-repo/semantics/openAccess