After adjusting for age, history of hypertension, shortness of breath, white blood cells, platelets, D-dimer, and CD4/CD8 ratio (Mode 6), the HR for in-hospital death in the group with lower CD4+T cell level was 7.656 (95%CI: 1.610–36.396, P=0.010). Here, CD4 is linked to hypertensive disorder.