Conversely, the CAD group had significantly lower levels of pulse pressure (PP), diastolic blood pressure (DBP), white blood cells (WBC), red blood cells (RBC), platelets (PLT), hematocrit (Hct), hemoglobin (Hb), CD4 + and CD8+ T cells, high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), total cholesterol (TC), apolipoprotein B (ApoB), glycated hemoglobin (HbA1c), estimated glomerular filtration rate (eGFR), use of angiotensin-converting enzyme inhibitors (ACEI) or angiotensin II receptor blockers (ARBs), and beta-blockers (P < 0.001). The gene discussed is CD8A; the disease is coronary artery disorder.