UK researchers on Wednesday announced the trial of a blood test for Alzheimer’s, which it is hoped will transform the diagnosis of the disease.

Researchers at University College London (UCL) will assess whether the test could improve the accuracy of diagnosis from 70 percent to over 90 percent.

Medics say early diagnosis is critical with Alzheimer’s, which is the most common cause of dementia, as the earlier treatment is started, the more effective it is.