Diabetes Mellitus (DM), a metabolic disorder characterized by chronic hyperglycemia, can be due to a defect in insulin secretion, a defect in its action, or both. Neurocognitive disorders or "organic mental disorders" present three categories: delirium, minor (or mild) impairment, and major neurocognitive disorder or dementia. These are two very prevalent conditions; several epidemiological studies have shown some characteristics common to both of them. Objective: To determine the relationship between Type 2 DM and neurocognitive disorders in an older adult population. Material and Methods: Analytical, retrospective, and secondary database study of investigations carried out between 2010 and 2015 in a population of 1,896 older adults, attended in the Geriatric service of the Naval Medical Center, the main hospital of the Peruvian Navy. Results: A higher frequency of male patients (58.4%)...