CYP24A1 and rheumatoid arthritis: Regarding rs46400959 CYP24A1, the most frequent genotype in patients with RA was the AA genotype (RA: 43% vs. CS: 36%), while in the CS group the most frequent genotype was AG (RA: 34% vs. CS: 42%), however, in both study groups the GG genotype was found at a lower frequency (RA: 23% vs. CS: 22%) (Table 3).