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Biomarkers may help in determining the underlying cause of dementia in a given patient. In this systematic review, investigators analyzed data from 15 neuroimaging and 9 cerebrospinal fluid (CSF) biomarker studies to determine their accuracy in distinguishing neuropathologically defined Alzheimer disease (AD) from non-AD dementia. Criteria for neuropathologically defined AD were heterogeneous across studies. Study size ranged from 27 to 217 participants, who were predominantly white, about 50% male, and had a mean age of dementia symptom onset of about 65 years.
Amyloid positron emission tomography (PET) imaging had high sensitivity (0.91) and specificity (0.92) for distinguishing AD from non-AD. Cut poi…