Fig. 1

Comparison of log-transformed Se levels between COVID-19 cases according to disease severity categories. A the mean (SD) of log-transformed Se was 3.74 (0.48), 3.70 (0.56), 3.33 (0.33) in mild, moderate, and severe group respectively (p = 0.01). Serum Se level in patients with severe COVID­19 was significantly less than mild (p = 0.002) and moderate group (p = 0.02) (ANOVA test and Games-Howell post-hoc analyses). B scatter plot between log-transformed of Se and Severity score of covid-19 disease