TCF7L2 and type 2 diabetes mellitus: The type 2 diabetes C allele of TCF7L2 (rs7901695) was associated with a lower risk of islet autoimmunity compared to the TT genotype (HR: 0.66; 95% CI: 0.47–0.94; P = 0.022), but significance was lost after correcting for multiple comparisons (Pcorrected = 0.264).