In addition, synthesis of the available data derived from two studies regarding the IL9 rs31563 (n = 1391) and MIF rs755622 (n = 649) SNPs provided significant associations with AD risk (OR (95% CI): 1.32 (1.07–1.64); I2 = 0.0%; OR (95% CI): 0.65 (0.49–0.86); I2 = 0.0%) (Figure 3; Supplementary Table S2). Here, IL9 is linked to Alzheimer disease.