This study also found that the best cut-off values of DC, DR2, DR4, DR8, AC and Lp-PLA2 for predicting VD were 4.5557 ms, 7.7, 0.27, 0.0061%, −5.1059 ms and 167 μg/L, respectively, and the best cut-off values of DC, DR2, DR4, DR8, AC and Lp-PLA2 for predicting AD were 4.9929 ms, 8.1, 0.45, 0.0036%, −5.65 ms and 158 μg/L, respectively. The gene discussed is PLA2G7; the disease is Alzheimer disease.