Table 1.

overview of all the included studies.

Authors	Country	Published	Study	N	Mean age	Data collected at	Clinical Features	Laboratory findings	Diagnostic imaging	Risk of Bias
Chen et al. (2020)	China	15/2/2020	CS	99	55	AH	✓	✓	✓	Low
Guan et al. (2020)	China	28/2/2020	CR	1099	47	AH	✓	✓	✓	Low
Cao et al. (2020)	China	13/3/2020	CS	102	54	AH	✓	✓	✓	Low
Qiu et al. (2020)	China	5/5/2020	CS	104	43	AH	✓	✓	✓	Moderate
Li et al. (2020)	China	10/4/2020	CS	225	50	AH	✓	✓	✓	High
Dai et al. (2020)	China	6/4/2020	CR	234	44	AH	✓	✓	✓	Low
Hong et al. (2020)	Korea	24/4/2020	CR	98	55	AH; ICU	✓	✓	✓	Moderate
Chen et al. (2020)	China	11/4/2020	CS	203	54	AH	✓	✓	✓	Moderate
Huang et al. (2020)	China	8/5/2020	CS	202	44	AH	✓	✓	✓	Low
Zhang et al. (2020)	China	10/5/2020	CS	194	48	AH	✓	✓	✓	Low
Lian et al. (2020)	China	12/5/2020	CS	465	45	AH	✓	✓	✓	Low
Israelsen et al. (2020)	Denmark	15/5/2020	CS	175	71	AH ICU	✓	✓	✓	Low
Li et al. (2020)	China	15/5/2020	CR	93	51	AH	✓	✓	✓	Moderate
Song et al. (2020)	China	16/5/2020	CS	111	55	AH	✓	✓	✓	Low
Argenziano et al. (2020)	USA	29/5/2020	CS	764	59	AH; ICU; ED	✓	✓		Low
Buckner et al. (2020)	USA	22/5/2020	CS	105	69	AH	✓	✓		Low
Imam et al. (2020)	USA	4/6/2020	Co	1305	61	AH	✓	✓	✓	Low
Zhao et al. (2020)	China	4/6/2020	CR	1000	61	AH	✓	✓	✓	High
Li et al. (2020)	China	11/6/2020	CS	1449	57	AH	✓	✓	✓	Low
Xu et al. (2020)	China	15/5/2020	CR	703	46	AH	✓	✓	✓	Low
Wang et al. (2020)	China	30/4/2020	CS	107	51	AH	✓	✓	✓	High

Abbreviations: AH, Admission at hospital; Co, Cohort studies; CR, Cross‐sectional studies; CS, Case series studies; ED, Emergency department; ICU, Intensive unit care admission.