The median and mean ages of DLB patients, both age at visit and onset, were older, and DLB patients had higher proportions of hypertension (32.6% vs. 17.2%, p = 0.015) and DM (23.9% vs. 10.8%, p = 0.018), as well as were more APOE ε4 carriers (57.6% vs. 12.9%, p < 0.001) than PDD patients. This evidence concerns the gene APOE and diabetes mellitus.