Analyzing PD and DLB patients separately, we still found a significant correlation between TT2 and MoCA, which was strong in PD patients (Spearman ́s rho = 0.550, 95% CI = 0.153–0.793, p = 0.008) and moderate in DLB (Spearman ́s rho = 0.335, 95% CI = 0.003–0.601, p = 0.043). Here, DOCK3 is linked to Lewy body dementia.