Table 1. Baseline clinical features of subjects with COVID-19 in different ages.

	All patients(n = 32)	Age <60 years old(n = 13)	Age≥60 years old(n = 19)	P- value
Sex–No., %
male	17(53.1%)	4(30.8%)	13(68.4%)	0.070
Exposure–No., %	25(78.1%)	10(76.9%)	15(78.9%)	1.000
Entering Symptoms–No., %
Fever	30(93.8%)	12(92.3%)	18(94.7%)	1.000
Cough	14(43.8%)	5(38.5%)	9(47.4%)	0.725
Expectoration	6(18.8%)	1(7.7%)	5(26.3%)	0.361
Fatigue	11(34.4%)	3(23.1%)	8(42.1%)	0.450
Headache	4(12.5%)	3(23.1%)	1(5.3%)	0.279
Diarrhea	3(9.4%)	2(15.4%)	1(5.3%)	0.552
Comorbidities–No., %
≥two comorbidities	15(46.9%)	5(38.5%)	10(52.6%)	0.491
COPD	4(12.5%)	0(0.0%)	4(21.1%)	0.128
Hypertension	10(31.3%)	4(30.8%)	6(31.6%)	1.000
Diabetes	8(25.0%)	3(23.1%)	5(26.3%)	1.000
Cardiovascular disease	4(12.5%)	0(0.0%)	4(21.1%)	0.128
Cerebrovascular disease	4(12.5%)	1(7.7%)	3(15.8%)	0.629
Chronic kidney disease	3(9.4%)	2(15.4%)	1(5.3%)	0.552
Time from onset to, media(IQR), d
diagnosis	7(5–11)	9(3–13.5)	7(5–9)	0.448
ICU	18.0(12.25–21.75)	20.0(12.5–25.5)	17(12–19)	0.170
mechanical ventilation	14(9–19)	14(10.5–19.5)	11(8.5–19)	0.467

Abbreviations: ARDS, Acute respiratory distress syndrome; HBV, Hepatitis B virus; COPD, Chronic obstructive pulmonary disease.