STAT4 and type 2 diabetes mellitus: The results showed that STAT4 rs11889341 (Dominant: OR 1.63, p = 0.035) and rs7574865 (Heterozygote: OR 1.75, p = 0.021; Dominant: OR 1.65, p = 0.030) significantly increased T2D risk in participants with BMI ≤ 24.