There was a significant relation between VDR ApaI variant and PD predisposition in the PB subgroup (A vs. a: OR = 0.85, 95% CI = 0.75–0.95, P = 0.005; AA vs. aa: OR = 0.70, 95% CI = 0.56–0.89, P = 0.003; AA/Aa vs. aa: OR = 0.80, 95% CI = 0.66–0.98, P = 0.027; AA vs. Aa/aa: OR = 0.77, 95% CI = 0.59–1.01, P = 0.058, Table 5). Here, VDR is linked to Parkinson disease.