Vitamin D was significantly lower in patients who gave a positive answer to the NMSQ questions about memory impairment (p = 0.036), while PTH levels were higher in patients with constipation (p = 0.044), trouble in having sex (p = 0.021), and leg restlessness (p = 0.020) (Supplementary Table 1). The gene discussed is PTH; the disease is memory impairment.