What is the most useful screening test of dementia?

The most useful screening test for dementia is the Mini-Mental State Examination (MMSE), which assesses various cognitive functions, including memory, attention, and language skills. Another widely used tool is the Montreal Cognitive Assessment (MoCA), which provides a more comprehensive evaluation of cognitive abilities. Both tests can help identify potential dementia, but they should be followed up with a thorough clinical assessment for an accurate diagnosis.