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Diabetes as a risk factor for greater COVID-19 severity and in-hospital death: A meta-analysis of observational studies

Open access
Mantovani, Alessandro, Byrne, Christopher D., Zheng, Ming-Hua, Targher, Giovanni·2020·Nutrition, Metabolism and Cardiovascular Diseases

Abstract

Aims To estimate the prevalence of established diabetes and its association with the clinical severity and in-hospital mortality associated with COVID-19. Data synthesis We systematically searched PubMed, Scopus and Web of Science, from 1st January 2020 to 15th May 2020, for observational studies of patients admitted to hospital with COVID-19. Meta-analysis was performed using random-effects modeling. A total of 83 eligible studies with 78,874 hospitalized patients with laboratory-confirmed COVID-19 were included. The pooled prevalence of established diabetes was 14.34% (95% CI 12.62–16.06%). However, the prevalence of diabetes was higher in non-Asian vs. Asian countries (23.34% [95% CI 16.40–30.28] vs. 11.06% [95% CI 9.73–12.39]), and in patients aged ≥60 years vs. those aged <60 years (23.30% [95% CI 19.65–26.94] vs. 8.79% [95% CI 7.56–10.02]). Pre-existing diabetes was associated with an approximate twofold higher risk of having severe/critical COVID-19 illness (n = 22 studies; random-effects odds ratio 2.10, 95% CI 1.71–2.57; I2 = 41.5%) and ~threefold increased risk of in-hospital mortality (n = 15 studies; random-effects odds ratio 2.68, 95% CI 2.09–3.44; I2 = 46.7%). Funnel plots and Egger's tests did not reveal any significant publication bias. Conclusions Pre-existing diabetes is significantly associated with greater risk of severe/critical illness and in-hospital mortality in patients admitted to hospital with COVID-19.

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Metadata

Authors
Mantovani, A., Byrne, C. D., Zheng, M.-H., & Targher, G.
Venue
Nutrition, Metabolism and Cardiovascular Diseases
Publisher
Elsevier BV
Published
2020-07
Volume
30
Issue
8
Pages
1236-1248
ISSN
0939-4753 (ISSN-L)
OpenAlex
W3031835167
Cited by
271
References
21
FWCI
3.31
Type
journal article
Language
en
Open access
bronze

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Mantovani, A., Byrne, C. D., Zheng, M.-H., & Targher, G. (2020). Diabetes as a risk factor for greater COVID-19 severity and in-hospital death: A meta-analysis of observational studies. Nutrition, Metabolism and Cardiovascular Diseases. https://doi.org/10.1016/j.numecd.2020.05.014

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