Table 1. Baseline characteristics of the study patients.

Variable		Total (n=331)	Asymptomatic, mild to moderate (n=281)	Severe to critical, or death (n=50)	p
Age at admission, years		54.0 [37.0–67.0]	50.0 [36.0–64.0]	69.0 [62.0–78.0]	<0.001†
	≥65 years	103 (31.1)	68 (24.2)	35 (70.0)	<0.001†
Sex, male		213 (64.4)	180 (64.1)	33 (66.0)	0.792
Smoking		72 (21.8)	63 (22.4)	9 (18.0)	0.485
Comorbidity
	Hypertension	91 (27.5)	61 (21.7)	30 (60.0)	<0.001†
	Diabetes	63 (19.0)	38 (13.5)	25 (50.0)	<0.001†
	Chronic lung disease*	11 (3.3)	9 (3.2)	2 (4.0)	0.675
	Cardio- or cerebrovascular disease	35 (10.6)	25 (8.9)	10 (20.0)	0.019†
	Chronic kidney disease	3 (0.9)	2 (0.7)	1 (2.0)	0.389
	Malignancy	13 (3.9)	12 (4.3)	1 (2.0)	0.700
	Neurological disorder other than cerebrovascular disease	19 (5.7)	14 (5.0)	5 (10.0)	0.160
	Psychiatric disorder	20 (6.0)	17 (6)	2 (4.0)	0.749

Data are n (%) or median [interquartile range] values.

^*Chronic lung disease includes asthma and chronic obstructive lung disease, ^†p<0.05, statistically significant.