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. 2020 Jul 6;48(9):1045–1050. doi: 10.1016/j.ajic.2020.06.221

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© 2020 Published by Elsevier Inc. on behalf of Association for Professionals in Infection Control and Epidemiology, Inc.

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 2 — Comparison of different stratification of symptomatic patients (n = 453). *: P < .05. (A) Comparing female with male group, there was no difference in age, onset days, epidemiological history (local or imported) between the 2 groups, while male patients had a higher critical illness rate. (B) Comparing the 3 groups of different age patients, there was no statistically significant difference in gender and the days of onset in the 3 groups, while the differences in disease classification and epidemiological characteristics (local, imported) were statistically significant. (C) Comparing local with imported group, there was no statistically significant. (D) Comparing mild with severe illness group, the differences in the days of onset was not statistically significant, while the differences in gender, age, and epidemiological history (local, imported) were statistically significant.