• Mayo Clinic proceedings · Aug 2020

    Observational Study

    Sex Differences in Case Fatality Rate of COVID-19: Insights From a Multinational Registry.

    • Mohamad Alkhouli, Aravinda Nanjundappa, Frank Annie, Mark C Bates, and Deepak L Bhatt.
    • Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN. Electronic address: Alkhouli.Mohamad@mayo.edu.
    • Mayo Clin. Proc. 2020 Aug 1; 95 (8): 161316201613-1620.

    ObjectivesTo confirm whether a relationship exists between male sex and coronavirus disease 2019 (COVID-19) mortality and whether this relationship is age dependent.Patients And MethodsWe queried the COVID-19 Research Network, a multinational database using the TriNetX network, to identify patients with confirmed COVID-19 infection. The main end point of the study was all-cause mortality.ResultsA total of 14,712 patients were included, of whom 6387 (43%) were men. Men were older (mean age, 55.0±17.7 years vs 51.1±17.9 years; P<.001) and had a higher prevalence of hypertension, diabetes, coronary disease, obstructive pulmonary disease, nicotine dependence, and heart failure but a lower prevalence of obesity. Before propensity score matching (PSM), all-cause mortality rate was 8.8% in men and 4.3% in women (odds ratio, 2.15; 95% CI, 1.87 to 2.46; P<.001) at a median follow-up duration of 34 and 32 days, respectively. In the Kaplan-Meier survival analysis, the cumulative probability of survival was significantly lower in men than in women (73% vs 86%; log-rank, P<.001). After PSM, all-cause mortality remained significantly higher in men than in women (8.13% vs 4.60%; odds ratio, 1.81; 95% CI, 1.55 to 2.11; P<.001). In the Kaplan-Meier survival analysis, the cumulative probability of survival remained significantly lower in men than in women (74% vs 86%; log-rank, P<.001). The cumulative probability of survival remained significantly lower in propensity score-matched men than in women after excluding patients younger than 50 years and those who were taking angiotensin-converting enzyme inhibitor or angiotensin receptor blocker medications on admission.ConclusionAmong patients with COVID-19 infection, men had a significantly higher mortality than did women, and this difference was not completely explained by the higher prevalence of comorbidities in men.Copyright © 2020. Published by Elsevier Inc.

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