Fig. 1

Comparison of COVID-19 blood test results between the early stage of onset and the stage of disease. The blood test results were collected from patients with COVID-19, and the data of the early stage of onset were obtained after performing the test closest to the onset date (i.e., within 3 days after hospitalization); information on stage of disease was obtained on the final test (i.e., within 2 days before discharge). The data were analyzed using SPSS software version 21. P values between 0.01 and 0.05, 0.001 and 0.01, and 0.0001–0.001 were considered statistically significant (*), very significant (**), and extremely significant (***), respectively. P values > 0.01 were considered not significant