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Table 1 Clinical characteristics of the study subjects according to the disease severity of COVID-19

From: Viral loads, lymphocyte subsets and cytokines in asymptomatic, mildly and critical symptomatic patients with SARS-CoV-2 infection: a retrospective study

Groups Systemic Upper respiratory Gastrointestinal Lung CT
Mild cases (n = 26) 14 (53.8%) 20 (76.9%) 2 (7.7%) 16 (61.5%) 0 (0%)
Severe or critical cases (n = 11) 11 (100%) 11 (100%) 4 (36.4%) 11 (100%) 11(100%)
Chi-Square value 7.514 3.030 4.667 5.798 16.865
P value 0.007 0.151 0.051 0.018 0.000
  1. Categorical variables were compared using the Fisher’s exact test
  2. Lung = Lung symptoms include: cough, sputum production, hemoptysis and shortness of breath
  3. CT, changes of chest computed tomography