Table 2.
Summary of the included studies
| Study | Journal | Hospital | Location | Period of recruitment (2020) | N patients | Age (median) |
|---|---|---|---|---|---|---|
| Beltrán-Corbellini et al. [27] | Eur J Neurol | Multicentric | Madrid, Spain | NA | 79 | 61.6a |
| Cai et al. [12] | Allergy | People's Hospital of Shenzhen | Shenzhen City, China | January 11–February 6 | 298 | 47,5 |
| Chen et al. [4] | The Lancet | Jinyintan Hospital | Wuhan, China | January 1–January 20 | 99 | 55.5a |
| Duanmu et al. [22] | AEMJ | Stanford Health Care | California, USA | March 4–March 23 | 100 | 45 |
| Feng et al. [13] | AJRCCM | Multicentric | China | February 1–February 15 | 476 | 53 |
| Giacomelli et al. [14] | Clinic Infectious Disease | L. Sacco Hospital | Milan, Italy | NA | 59 | 60 |
| Helms et al. [8] | NEJM | Strasbourg University Hospital | Strasbourg, France | March 3–April 3 | 58 | 63 |
| Jain et al. [24] | J Neurol Sci | New York City Department of Health and Mental Hygiene | New York, USA | March 1–April 13 | 3218 | NA |
| Lechien et al. [15] | Rhinology | Multicentric | France-Italy | NA | 417 | 36.9a |
| Li K et al. [16] | Invest Radiol | Chongqing Medical University | Chongqing, China | January NA–February NA | 83 | 45.5a |
| Li R et al. [17] | Journal of Clinical Virology | Hanchuan City People's Hospital | Hanchuan, Cina | January 20–February 14, | 225 | 50a |
| Mahammedi et al. [25] | Radiology | Multicentric | Italy | February 29–April 4 | 725 | NA |
| Mao et al. [7] | JAMA neurolgy | Multicentric | Wuhan, China | January 16–February 19 | 214 | 52.7a |
| Qin et al. [23] | Stroke | Tonji Hospital | Wuhan, China | January 27–March 5 | 1875 | 63 |
| Radmanesh et al. [26] | AJNR | New York University Langone Medical Center | New York, USA | March 1–March 31 | 3661 | NA |
| Tian et al. [18] | Journal of Infection | Beijing Emergency Medical Service | Bejing, China | January 20–February 10 | 262 | 47.5 |
| Wan et al. [19] | Journal of Medical Virology | Three Georges Central Hospital | Chongqing, China | January 23–February 8 | 135 | 47 |
| Wang et al. [20] | JAMA | Zhongnan Hospital of Wuhan University | Wuhan, China | January 1–February 28 | 138 | 56 |
| Xu et al. [21] | TheBMJ | Multicentric | Zhejiang, China | January 10–January 26 | 35 | 41 |
AEMJ Academic Emergency Medicine, AJNR American Journal of Neuroradiology,AJRCCM American Journal of Respiratory and Critical Care Medicine, JAMA The Journal of the American Medical Association, NA not available, NEJM New England Journal of Medicine
aValue expressed as mean