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. 2020 Jul 31;161:105107. doi: 10.1016/j.phrs.2020.105107

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Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig. 6 — Meta-analysis of the association between Scr and BUN levels and severe infection in COVID-19 patients.

A. Forest plot of the association between serum levels of creatinine and severe infection in COVID-19 patients.

B. Funnel plot of serum creatinine levels and severe infection for the assessment of publication bias.

C. Forest plot of the association between serum blood urea nitrogen levels and severe infection in COVID-19 patients. D. Funnel plot of serum blood urea nitrogen levels and severe infection for the assessment of publication bias.