Blood test predicts dementia diagnosis

Changes in the blood may signify Alzheimer's disease in its earliest stages, researchers found.

The study identified 10 molecules in blood that could be used to predict with at least 90% accuracy whether people will go on to develop mild cognitive impairment or Alzheimer's disease.

It is the first research which has been able to show differences in biomarkers in the blood between people with Alzheimer's disease before the symptoms occur and people who will not go on to develop the condition.

The finding has potential for developing treatment strategies for Alzheimer's at an earlier stage – when therapy would be more effective at slowing or preventing onset of symptoms, the authors said.

Researchers from Georgetown University Medical Center in the US examined 525 healthy participants aged 70 or older and monitored them for five years.

During the research, 28 participants went on to develop the conditions and 46 were

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