The analysis results are shown in supplementary Table 4: except for ICU admission days, there were significant differences (P < 0.05) between the other variables and the target variable (severity), including age, coinfection, CD4+, CD4+/CD8+, multiple lung infiltrates, smoking, hypertension, and hospital admission days, which were included in the model construction. The gene discussed is CD4; the disease is hypertensive disorder.