The outcomes displayed that MIP-1β (SMD = 0.92, 95% CI: −0.82 to 6.25) and CX3CL1 (SMD = −0.61, 95% CI: −2.11 to 0.89) showed no significant difference between AD patients and healthy controls (Table 3). Here, CX3CL1 is linked to Alzheimer disease.