Individuals whose parents both suffer from Alzheimer's are more likely to develop the condition themselves, it has emerged.
A study conducted at the University of Washington suggested that the average person has a one in ten chance of developing the condition, which is the most common form of dementia.
However, a person with two parents suffering from Alzheimer's has a 23 per cent chance of developing the disease themselves.
These figures were based upon a study of 111 families in which both parents suffered form Alzheimer's.
Lead researcher, Suman Jaydev stated that these results emphasise the genetic component of the illness.
The study also showed that there was a link between a family presence of the condition and the development of earlier onset Alzheimer's.
Participants with a family history of Alzheimer' on both sides had an average onset age of 57-years-old, while those whose family history of Alzheimer's was limited to their parents had an average onset of 72 years.
According to the Alzheimer's Society, delaying the onset of dementia by five years would reduce deaths directly attributable to dementia by 30,000 a year.
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