• J R Soc Med · Jan 2022

    Association between multimorbidity and mortality in a cohort of patients admitted to hospital with COVID-19 in Scotland.

    • Utkarsh Agrawal, Amaya Azcoaga-Lorenzo, Adeniyi Francis Fagbamigbe, Eleftheria Vasileiou, Paul Henery, Colin R Simpson, Sarah J Stock, Syed Ahmar Shah, Chris Robertson, Mark Woolhouse, Lewis D Ritchie, Aziz Shiekh, Ewen M Harrison, Annemarie B Docherty, and Colin McCowan.
    • School of Medicine, University of St. Andrews, KY16 9TF, UK.
    • J R Soc Med. 2022 Jan 1; 115 (1): 223022-30.

    ObjectivesWe investigated the association between multimorbidity among patients hospitalised with COVID-19 and their subsequent risk of mortality. We also explored the interaction between the presence of multimorbidity and the requirement for an individual to shield due to the presence of specific conditions and its association with mortality.DesignWe created a cohort of patients hospitalised in Scotland due to COVID-19 during the first wave (between 28 February 2020 and 22 September 2020) of the pandemic. We identified the level of multimorbidity for the patient on admission and used logistic regression to analyse the association between multimorbidity and risk of mortality among patients hospitalised with COVID-19.SettingScotland, UK.ParticipantsPatients hospitalised due to COVID-19.Main Outcome MeasuresMortality as recorded on National Records of Scotland death certificate and being coded for COVID-19 on the death certificate or death within 28 days of a positive COVID-19 test.ResultsAlmost 58% of patients admitted to the hospital due to COVID-19 had multimorbidity. Adjusting for confounding factors of age, sex, social class and presence in the shielding group, multimorbidity was significantly associated with mortality (adjusted odds ratio 1.48, 95%CI 1.26-1.75). The presence of multimorbidity and presence in the shielding patients list were independently associated with mortality but there was no multiplicative effect of having both (adjusted odds ratio 0.91, 95%CI 0.64-1.29).ConclusionsMultimorbidity is an independent risk factor of mortality among individuals who were hospitalised due to COVID-19. Individuals with multimorbidity could be prioritised when making preventive policies, for example, by expanding shielding advice to this group and prioritising them for vaccination.

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