Table 1.
Baseline information of COVID-19 patients and asymptomatic SARS-CoV-2 carriers in Ningbo and Zhoushan cities of Zhejiang province, China.
| Asymptomatic carriers (N = 31) | Symptomatic COVID-19 patients (N = 148) | Presymptomatic COVID-19 patients (N = 14) | P* | P& | P# | |
|---|---|---|---|---|---|---|
| Gender | 0.453 | 1.000 | 0.750 | |||
| Male | 15 (48.4) | 50 (33.8) | 7 (50.0) | |||
| Female | 16 (51.6) | 98 (66.2) | 7 (50.0) | |||
| Age, years | 42.00 (24.00−55.00) | 53.00 (38.00−62.75) | 55.00 (39.50−71.00) | <0.001 | 0.002 | 1.000§ |
| <30 | 9 (29.0) | 17 (11.5) | 1 (7.1) | 0.076 | 0.345 | 1.000 |
| 30−59 | 18 (58.1) | 89 (60.1) | 8 (57.1) | |||
| ≥60 | 4 (12.9) | 42 (28.4) | 5 (35.7) | |||
| Underlying diseases | 1.000 | 1.000 | 1.000 | |||
| No | 24 (77.4) | 104 (71.7) | 9 (64.3) | |||
| Yes | 7 (22.6) | 41 (28.3) | 5 (35.7) | |||
| WBC, 109/L | 5.83 (5.00−7.11) | 4.63 (3.80−5.69) | 5.83 (4.73−6.75) | <0.001 | 1.000 | 0.075§ |
| Lymphocyte, 109/L | 1.53 (1.32−2.11) | 1.22 (0.86−1.60) | 1.26 (0.89−1.86) | 0.003 | 0.420 | 1.000§ |
| CRP, mg/L | 1.00 (0.60−2.99) | 6.90 (2.04−18.20) | 3.07 (0.97−14.45) | <0.001 | 0.317 | 0.885§ |
| Viral shedding, day | 24.00 (21.00−30.80) | 46.50 (35.00−58.00) | 48.00 (23.75−51.25) | <0.001 | 0.002 | 1.000§ |
| qRT-PCR-CT values | 31.40 (27.50−34.50) | 29.00 (24.25−32.00) | 33.50 (28.25−36.25) | 0.004 | 0.410 | 0.003§ |
| IgM | 1.000 | 1.000 | 1.000 | |||
| Negative | 12 (38.7) | 43 (31.9) | 5 (50.0) | |||
| Positive | 19 (61.3) | 91 (67.4) | 5 (50.0) | |||
| Weak positive | 0 (0.0) | 1 (0.7) | 0 (0.0) | |||
| IgG | 0.112 | 1.000 | 0.504 | |||
| Negative | 2 (6.5) | 10 (7.4) | 1 (10.0) | |||
| Positive | 25 (80.6) | 122 (90.4) | 8 (80.0) | |||
| Weak positive | 4 (12.9) | 3 (2.2) | 1 (10.0) |
Abbreviations: WBC, white blood cell; CRP, C-reactive protein; CT, cycling threshold; IQR, interquartile range.
P*, asymptomatic carrier vs. symptomatic COVID-19 patients.
P&, asymptomatic carrier vs. presymptomatic COVID-19 patients.
P#, symptomatic COVID-19 patients vs. presymptomatic COVID-19 patients.
§Continuous variables are expressed as median (IQR). P value was calculated using Kruskal Wallis test.
Categorical variables are expressed as n (%). P values were calculated using χ² test and Fisher’s exact test.