VDR and rheumatoid arthritis: The population was in HWE (χ2 =2.0; p = 0.15), and for the rs731236 TaqI VDR the most frequent genotype in the RA was the CT genotype (RA: 54% vs. CS: 41%), followed by the TT genotype (RA: 38% vs. CS: 54%), and less frequently the CC genotype (RA: 8% vs. CS: 5%) (Table 3).