Fig. 9

Comparison of B lymphocyte count and percentage among the four subgroups. DM, diabetes mellitus; non-DM, without diabetes mellitus; COVID-19, coronavirus disease 2019. a B lymphocyte count. b B lymphocyte percentage. Unpaired two-way ANOVA was used for interaction comparisons (a, b P all > 0.05). Unpaired one-way ANOVA was used for intergroup comparisons (a P < 0.05; b P > 0.05). Unpaired t-tests was used for comparisons with the non-severe non-DM subgroup or between two groups, *P < 0.05, ***P < 0.001. Unpaired t-tests was used for comparisons with the severe non-DM subgroup, ##P < 0.01