VDR and polycystic ovary syndrome: Subgroup analysis by ethnicity revealed a significant association between polymorphism of VDR BsmI rs1544410 (A > G) and susceptibility to polycystic ovary syndrome in the Asian population (allelic model: G vs. A: OR = 1.27, 95%CI = 1.06~1.53, P = 0.011; dominant model: GG vs. CA + AA: OR = 1.89, 95%CI = 1.08~3.30, P = 0.026) (Fig. 2), but this association was not found in the Caucasian population.