{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T15:27:32Z","timestamp":1790263652599,"version":"4.1.0"},"reference-count":25,"publisher":"Elsevier BV","license":[{"start":{"date-parts":[[2021,5,1]],"date-time":"2021-05-01T00:00:00Z","timestamp":1619827200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2021,5,1]],"date-time":"2021-05-01T00:00:00Z","timestamp":1619827200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"}],"content-domain":{"domain":["clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Archives of Gerontology and Geriatrics"],"published-print":{"date-parts":[[2021,5]]},"DOI":"10.1016\/j.archger.2020.104335","type":"journal-article","created":{"date-parts":[[2020,12,30]],"date-time":"2020-12-30T11:28:51Z","timestamp":1609327731000},"page":"104335","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":22,"special_numbering":"C","title":["Clinical presentation and mortality in hospitalized patients aged 80+ years with COVID-19\u2013A retrospective cohort study"],"prefix":"10.1016","volume":"94","author":[{"given":"Linda Katharina","family":"Karlsson","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lasse Hjort","family":"Jakobsen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Louise","family":"Hollensberg","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jesper","family":"Ryg","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mette","family":"Midttun","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Henrik","family":"Frederiksen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andreas","family":"Glenth\u00f8j","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anette Raskov","family":"Kodahl","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joanna","family":"Secher-Johnsen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lene Kongsgaard","family":"Nielsen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nuria Gonzalez","family":"Bofill","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fredrikke Christie","family":"Knudtzen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cecilia Margareta","family":"Lund","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"78","reference":[{"issue":"5","key":"10.1016\/j.archger.2020.104335_bib0001","doi-asserted-by":"crossref","first-page":"453","DOI":"10.1007\/s12603-020-1357-9","article-title":"Editorial: COVID-19 Spiraling of Frailty in Older Italian Patients","volume":"24","author":"Abbatecola","year":"2020","journal-title":"The journal of nutrition, health & aging"},{"issue":"3","key":"10.1016\/j.archger.2020.104335_bib0002","first-page":"263","article-title":"The Danish National Hospital Register. A valuable source of data for modern health sciences","volume":"46","author":"Andersen","year":"1999","journal-title":"Danish medical bulletin"},{"issue":"5","key":"10.1016\/j.archger.2020.104335_bib0003","doi-asserted-by":"crossref","first-page":"373","DOI":"10.1016\/0021-9681(87)90171-8","article-title":"A new method of classifying prognostic comorbidity in longitudinal studies: Development and validation","volume":"40","author":"Charlson","year":"1987","journal-title":"Journal of chronic diseases"},{"issue":"4","key":"10.1016\/j.archger.2020.104335_bib0004","doi-asserted-by":"crossref","first-page":"404","DOI":"10.1093\/biomet\/26.4.404","article-title":"The use of confidence or fiducial limits illustrated in the case of the binomial","volume":"26","author":"Clopper","year":"1934","journal-title":"Biometrika"},{"key":"10.1016\/j.archger.2020.104335_bib0005","first-page":"m1985","article-title":"Features of 20\u2009133 UK patients in hospital with covid-19 using the ISARIC WHO Clinical Characterisation Protocol: Prospective observational cohort study","volume":"369","author":"Docherty","year":"2020","journal-title":"BMJ (Clinical research ed.)"},{"issue":"3","key":"10.1016\/j.archger.2020.104335_bib0006","doi-asserted-by":"crossref","first-page":"M146","DOI":"10.1093\/gerona\/56.3.M146","article-title":"Frailty in older adults: Evidence for a phenotype","volume":"56","author":"Fried","year":"2001","journal-title":"The journals of gerontology. Series A, Biological sciences and medical sciences"},{"issue":"1","key":"10.1016\/j.archger.2020.104335_bib0007","doi-asserted-by":"crossref","first-page":"e93","DOI":"10.1016\/j.jinf.2020.04.009","article-title":"Clinical characteristics of older patients: The experience of a geriatric short-stay unit dedicated to patients with COVID-19 in France","volume":"81","author":"Godaert","year":"2020","journal-title":"Journal of Infection"},{"issue":"6","key":"10.1016\/j.archger.2020.104335_bib0008","doi-asserted-by":"crossref","DOI":"10.1371\/journal.pone.0234765","article-title":"The prevalence of symptoms in 24,410 adults infected by the novel coronavirus (SARS-CoV-2; COVID-19): A systematic review and meta-analysis of 148 studies from 9 countries","volume":"15","author":"Grant","year":"2020","journal-title":"PloS one"},{"key":"10.1016\/j.archger.2020.104335_bib0009","doi-asserted-by":"crossref","DOI":"10.1016\/j.jamda.2020.08.014","article-title":"Age, Frailty, and comorbidity as prognostic factors for short-term outcomes in patients with coronavirus disease 2019 in geriatric care","author":"H\u00e4gg","year":"2020","journal-title":"Journal of the American Medical Directors Association"},{"issue":"6","key":"10.1016\/j.archger.2020.104335_bib0010","first-page":"241","article-title":"Elderly patients with an atypical presentation of illness in the emergency department","volume":"75","author":"Hofman","year":"2017","journal-title":"The Netherlands journal of medicine"},{"key":"10.1016\/j.archger.2020.104335_bib0011","first-page":"1","article-title":"Risk factors for disease progression in hospitalized patients with COVID-19: A retrospective cohort study","volume":"52","author":"Hou","year":"2020","journal-title":"Infectious diseases (London, England)"},{"issue":"6","key":"10.1016\/j.archger.2020.104335_bib0012","article-title":"Characteristics of patients with COVID-19 pneumonia at Hvidovre Hospital, March-April 2020","volume":"67","author":"Israelsen","year":"2020","journal-title":"Danish medical journal"},{"issue":"9","key":"10.1016\/j.archger.2020.104335_bib0013","article-title":"Characteristics and early outcomes of patients hospitalised for COVID-19 in North Zealand, Denmark","volume":"67","author":"Lendorf","year":"2020","journal-title":"Danish medical journal"},{"issue":"6","key":"10.1016\/j.archger.2020.104335_bib0014","doi-asserted-by":"crossref","first-page":"e14","DOI":"10.1016\/j.jinf.2020.03.005","article-title":"Clinical features of COVID-19 in elderly patients: A comparison with young and middle-aged patients","volume":"80","author":"Liu","year":"2020","journal-title":"Journal of Infection"},{"key":"10.1016\/j.archger.2020.104335_bib0015","article-title":"Low mortality of hospitalised patients with COVID-19 in a tertiary Danish hospital setting","author":"Madsen","year":"2020","journal-title":"International Journal of Infectious Diseases"},{"key":"10.1016\/j.archger.2020.104335_bib0016","doi-asserted-by":"crossref","DOI":"10.1093\/ageing\/afaa189","article-title":"The impact of delirium on outcomes for older adults hospitalised with COVID-19","author":"Marengoni","year":"2020","journal-title":"Age and ageing"},{"key":"10.1016\/j.archger.2020.104335_bib0017","doi-asserted-by":"crossref","DOI":"10.1016\/j.archger.2020.104058","article-title":"Clinical characteristics of older patients infected with COVID-19: A descriptive study","volume":"89","author":"Niu","year":"2020","journal-title":"Archives of gerontology and geriatrics"},{"issue":"2","key":"10.1016\/j.archger.2020.104335_bib0018","doi-asserted-by":"crossref","first-page":"130","DOI":"10.1111\/j.1532-5415.1995.tb06377.x","article-title":"Validation of the Cumulative Illness Rating Scale in a geriatric residential population","volume":"43","author":"Parmelee","year":"1995","journal-title":"Journal of the American Geriatrics Society"},{"key":"10.1016\/j.archger.2020.104335_bib0019","unstructured":"Referenceintervaller. Available: https:\/\/www.gentoftehospital.dk\/afdelinger-og-klinikker\/klinisk-biokemisk-afdeling\/tilsundhedsfaglige\/Documents\/Referenceintervaller%2019.%20aug%202020.pdf Accessed October 19th, (2020). In Danish."},{"key":"10.1016\/j.archger.2020.104335_bib0020","doi-asserted-by":"crossref","DOI":"10.1093\/ije\/dyaa140","article-title":"Characteristics and predictors of hospitalization and death in the first 11 122 cases with a positive RT-PCR test for SARS-CoV-2 in Denmark: A nationwide cohort","author":"Reilev","year":"2020","journal-title":"International journal of epidemiology"},{"issue":"9085","key":"10.1016\/j.archger.2020.104335_bib0021","doi-asserted-by":"crossref","first-page":"1157","DOI":"10.1016\/S0140-6736(05)63817-2","article-title":"How should clinical care of the aged differ?","volume":"350","author":"Resnick","year":"1997","journal-title":"Lancet (London, England)"},{"issue":"5","key":"10.1016\/j.archger.2020.104335_bib0022","doi-asserted-by":"crossref","first-page":"926","DOI":"10.1111\/jgs.16472","article-title":"COVID-19 and Older Adults: What We Know","volume":"68","author":"Shahid","year":"2020","journal-title":"Journal of the American Geriatrics Society"},{"key":"10.1016\/j.archger.2020.104335_bib0023","unstructured":"Socialstyrelsen. Statistik \u00f6ver antal avlidna i covid-19. Available: https:\/\/www.socialstyrelsen.se\/statistik-och-data\/statistik\/statistik-om-covid-19\/statistik-over-antal-avlidna-i-covid-19\/ Accessed September 21st, (2020). In Swedish."},{"key":"10.1016\/j.archger.2020.104335_bib0024","unstructured":"UpToDate. Coronavirus disease 2019 (COVID-19): Clinical features Available: https:\/\/www.uptodate.com\/contents\/coronavirus-disease-2019-covid-19-clinical-features?search=coronavirus%20infection&source=search_result&selectedTitle=3~150&usage_type=default&display_rank=3 Accessed September 21st, (2020)."},{"key":"10.1016\/j.archger.2020.104335_bib0025","doi-asserted-by":"crossref","DOI":"10.1111\/jgs.16894","article-title":"COVID-19 in older adults: A series of 76 patients 85\u2009years old and above with COVID-19","author":"Vrillon","year":"2020","journal-title":"Journal of the American Geriatrics Society"}],"container-title":["Archives of Gerontology and Geriatrics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0167494320303319?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0167494320303319?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2025,9,28]],"date-time":"2025-09-28T20:06:44Z","timestamp":1759090004000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0167494320303319"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,5]]},"references-count":25,"alternative-id":["S0167494320303319"],"URL":"https:\/\/doi.org\/10.1016\/j.archger.2020.104335","relation":{},"ISSN":["0167-4943"],"issn-type":[{"value":"0167-4943","type":"print"}],"subject":[],"published":{"date-parts":[[2021,5]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Clinical presentation and mortality in hospitalized patients aged 80+ years with COVID-19\u2013A retrospective cohort study","name":"articletitle","label":"Article Title"},{"value":"Archives of Gerontology and Geriatrics","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.archger.2020.104335","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"\u00a9 2020 Elsevier B.V. All rights reserved.","name":"copyright","label":"Copyright"}],"article-number":"104335"}}