Table 4.

Comparison results of demographics, baseline characteristics of different severity grade COVID-19 patients.

Demographics, baseline characteristics		Mild (n = 99)	Severe (n = 4)	Critical (n = 11)	P
Sex	Male	49	0	7	0.09
	Female	50	4	4
Age	Mean (SD)	44 (14.62)ab	63.75 (9.67)	58.09 (12.03)	<0.05
	7~13	2	0	0	0.14
	13~18	2	0	0
	18~25	7	0	0
	25~65	81	2	8
	>65	7	2	3
Interval of onset-first diagnosis	Mean (SD)	2.31 (2.15)	1.75 (1.71)	2.82 (2.18)	0.59
Interval of first diagnose-hospitalization	Mean (SD)	2.12 (1.73)	2.75 (2.87)	2.45 (1.64)	0.67
Occupation	Civil servant/teacher/retired	7b	1	4	0.05
	Worker	5b	0	1
	Farmer	11b	1	0
	Self-employed	7b	0	0
	Student	6b	0	0
	Company employee	16b	0	1
	No job	13b	2	4
	Unknown	34b	0	1
Exposure history	Wildlife exposure	1	0	0	0.93
	Wuhan travel history	40	1	3	0.59
	COVID-19 patient close contact history	59	3	4	0.26
	Aggregation	43	2	3	0.56
Signs and symptoms at admission	Fever	13	0	0
	Cough	64	3	5	0.41
	Sputum	28	2	3	0.64
	Shortness of breath	8ab	3c	6	<0.001
	Nasal congestion	5	0	2	0.22
	Rhinorrhoea	5	0	1	0.76
	Diarrhoea	6	0	1	0.81
	Nausea and vomiting	4	0	1
	Insomnia	3ab	0c	4	<0.05
	Inappetence	17ab	0c	5	0.048
	Frequent urination	9	1	1	0.57

^aDifference between mild group and severe groups had statistical significance (p < 0.05).

^bDifference between the mild and the critical groups had statistical significance (p < 0.05).

^cDifference between the severe and the critical groups had statistical significance (p < 0.05).