Table 3.

Clinical features, laboratory data and chest CT scan in the follow-up

	Total (n = 51)	Positive cases (n = 25)	Negative cases (n = 26)	p value
Fever (temperature ≥ 37.3 °C)	0 (0%)	0 (0%)	0 (0%)
Cough	27 (52.9%)	11 (44.0%)	6 (23.1%)	0.113
Fatigue	0 (0%)	0 (0%)	0 (0%)
Lymphocyte count below the normal range	2 (3.9%)	2 (8%)	0 (0%)	0.912
IgG, S/CO	15.62 (3.81–33.45)	9.55 (2.24–25.65)	25.09 (5.92–84.50)	0.027
≤ 10	20 (39.2%)	13 (52.0%)	7 (26.9%)	0.110
> 10 to ≤ 30	17 (33.3%)	8 (32.0%)	9 (34.6%)
> 30	14 (27.5%)	4 (16.0%)	10 (38.5%)
IgM, S/CO	1.70 (0.52–4.91)	0.63 (0.39–3.82)	2.46 (0.93–5.33)	0.011
≤ 1	23 (45.1%)	16 (64.0%)	7 (26.9%)	0.027
> 1 to ≤ 10	20 (39.2%)	6 (24.0%)	14 (53.8%)
> 10	8 (15.7%)	3 (18.0%)	5 (19.2%)
IL-2 (normal range ≤ 7.5 pg/mL)	0.00 (0.00–0.02)	0.00 (0.00–0.06)	0.00 (0.00–0.01)	0.206
IL-6 (normal range ≤ 5.4 pg/mL)	1.61 (1.08–2.27)	1.61 (0.60–2.45)	1.57 (1.30–2.08)	0.832
IL-8 (normal range ≤ 20.6 pg/L)	4.17 (1.80–7.39)	4.17 (1.45–8.16)	3.83 (1.89–6.38)	0.903
IL-1B(normal range ≤ 12.4 pg/mL)	0.16 (0.00–0.94)	0.00 (0.00–0.84)	0.49 (0.00–0.96)	0.456
IFN-γ(normal range ≤ 23.1 pg/mL)	1.51 (0.68–2.92)	1.12 (0.54–2.97)	1.80 (1.12–2.84)	0.550
During of viral shedding, days	18.0 (9.0–35.5)	36.0 (30.0–43.0)	9.0 (7.0–11.0)	0.000
Imaging features
Consolidation	3 (5.9%)	2 (8.0%)	1 (3.8%)	0.972
Ground-glass opacity	33 (64.7%)	15 (60.0%)	18 (69.2%)	0.490
Bilateral infiltration	32 (62.7%)	14 (56.0%)	18 (59.2%)	0.329

Data are given as n (%) or median (IQR)

S/CO signal/cut-off, ↓ below normal range, Ig immunoglobulin, CT computed tomography, IL interleukin, IFN interferon