The MSH5 SNP occurred with significantly higher frequency in T1D patients than in controls (p = 3.01 × 10−7; OR = 2.54), but the presence of this polymorphism was significantly lower in comparison with the CD group: 35.5% and 69.3%, respectively (p = 4.15 × 10−14, OR = 4.1). This evidence concerns the gene MSH5 and type 1 diabetes mellitus.