The risk of anxiety was increased by 0.5% (OR = 1.005, 95% CI: 1.002–1.009) for every unit increase in blood PTH level, but it decreased by 3.9% (OR = 0.961, 95% CI: 0.926–0.998) for each unit increase in Hb in the MHD patients. The gene discussed is GSTM1; the disease is Anxiety.