The blood test diagnosed Alzheimer's 90 percent of the time, outperforming dementia specialists (73%) and primary care doctors (61%) who rely on expensive, invasive exams like PET scans and spinal taps.
The test focuses on measuring tau protein levels in the blood, associated with Alzheimer's. It excels in detecting advanced-stage dementia but is less accurate for early-stage Alzheimer's cases like subjective cognitive decline.
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