CA6 and inflammatory bowel disease: HC subjects who carried the AA and AG genotypes of the gustin gene polymorphism were higher than those of the HC subjects with the GG genotype (p < 0.039; Duncan’s test adjusted by Bonferroni correction subsequent to two-way ANCOVA), whereas no significant differences related to the gustin gene polymorphism were found in IBD patients (p > 0.05) (Figure 2C).