Table 1.

Baseline demographic and clinical characteristics of the included patients.

Characteristics	All patients (n = 43)	RD Group (n = 18)	NRD group (n = 25)	P value
Age (y, mean ± standard deviation)	44.35 ± 13.44	46.89 ± 13.60	42.52 ± 13.29	.298
Male Gender (%)	26 (60.5%)	11 (61.1%)	15 (60.0%)	.941
BMI	23.39 ± 2.76	23.73 ± 3.20	23.13 ± 2.41	.495
Initial symptoms
Fever† (%)	34 (79.1%)	15 (83.3%)	19 (76.0%)	.560
Low fever (37.3–38°C)	15 (34.9%)	4 (22.2%)	11 (44.0%)	.139
Medium fever (38–39°C)	18 (41.9%)	10 (55.6%)	8 (23.0%)	.122
High fever (>39°C)	1 (2.3%)	1 (5.6%)	0 (0%)	.233
Body temperature	37.75 ± 0.75	37.88 ± 0.75	37.65 ± 0.74	.321
Cough (%)	30 (69.8%)	12 (66.7%)	18 (72.0%)	.707
Fatigue (%)	5 (11.6%)	4 (22.2%)	1 (4%)	.066
Dyspnea (%)	2 (4.7%)	2 (11.1%)	0 (0.0%)	.222
Sore throat (%)	3 (7.0%)	2 (11.1%)	1 (4%)	.367
Nasal congestion and runny nose (%)	7 (16.3%)	4 (22.2%)	3 (12.0%)	.382
Loss of appetite (%)	3 (7.0%)	2 (11.1%)	1 (4%)	.367
Laboratory test findings
Leukocyte count (109/L)	5.65 ± 2.03	4.61 ± 1.56	6.40 ± 2.02	.003∗
Lymphocyte count (109/L)	1.67 ± 0.67	1.41 ± 0.63	1.86 ± 0.65	.030∗
Increased hs-CRP (%)	19 (44.2%)	12 (66.7%)	7 (28.0%)	.012∗
Comorbidities (%)
Cardiovascular disease‡	6 (13.9%)	2 (11.1%)	4 (16.0%)	.684
Diabetes mellitus type II	4 (9.3%)	2 (11.1%)	2 (8.0%)	.729
Liver disease§	4 (9.3%)	2 (11.1%)	2 (8.0%)	.729
Hyperthyroiditis	1 (2.3%)	0 (0.0%)	1 (4.0%)	.391
Allergic rhinitis	1 (2.3%)	0 (0.0%)	1 (4.0%)	.391
Hospital stay (days)	21 (17)	24 (18.75)	18 (15.5)	.217
Time from symptom onset to hospital admission (days)	5 (7)	4 (5)	5 (6)	.258

^∗P < .05.

^†Maximum body temperature since symptoms onset. Fever was defined as axillary temperature of at least 37.3°C.

^‡Cardiovascular disease included hypertension, coronary artery disease.

^§Liver disease included cirrhosis, hepatitis B.