The PMHNP primarily works with older adult patients who frequently present with cognitive issues. He knows many people with Lewy body dementia are misdiagnosed or do not receive diagnosis for 18 months or more. Which of the following assessment tools does the PMHNP use to discriminate between Lewy body dementia (LBD), Parkinson's disease dementia (PDD), and mild cognitive impairment (MCI) due to Lewy body disease from other forms of cognitive impairment?

Choice A reason: The AD8 is a brief informant interview used to detect early cognitive changes but does not specifically differentiate between LBD, PDD, and MCI due to Lewy body disease. Choice B reason: The Mini-Cog is a screening tool for cognitive impairment but lacks specificity for Lewy body pathology. Choice C reason: The Lewy Body Composite Risk Score is specifically designed to assess features that differentiate LBD, PDD, and MCI related to Lewy body disease from other dementias, making it the most appropriate tool. Choice D reason: The Informant Questionnaire on Cognitive Decline in the Elderly assesses general cognitive decline but does not provide specificity for Lewy body disease subtypes.