VDR and polycystic ovary syndrome: The results of logistic regression applied to the codominant genotype model showed a significant difference in the genotypic distribution (TT, CT and CC) of the VDR-Fokl gene polymorphism between PCOS cases with seborrhea and without seborrhea (p = 0.033, p-corrected = 0.044) but no significant association between genotypes and seborrhea in women without PCOS (p = 0.807) (Table 3).