The U.K. Medical Research Council and the Alzheimer's Society funded the study.
The MPs, who received administration and funding support from the Alzheimer's Society during the inquiry, said the social care workforce had a limited knowledge of the condition.
Professor Clive Ballard, one of the report authors and director of research at the Alzheimer's Society, said the finding was significant.
Mr Brown is raising money and awareness for Neuroscience Research Australia and The Alzheimer's Society.
However, Susanne Sorenson, from the Alzheimer's Society, had some words of cheer for partnerless people.
The Alzheimer's Society said this type of supported, independent living was an "ideal model of care".
There is some evidence of this in the Yougov poll, commissioned by the Alzheimer's Society.
BBC: Carey Mulligan supports bid to raise dementia awareness
The Alzheimer's Society said the incident showed "a lack of understanding in society" of dementia.
BBC: Dementia patient tasered by police alarming says charity
The Alzheimer's Society says around 800, 000 people in the UK have a form of dementia.
BBC: Comedians Meera Syal and Jo Brand are 'dementia friends'
Jeremy Hughes, chief executive of the Alzheimer's Society, expressed concern over the poll's findings.
BBC: Carey Mulligan supports bid to raise dementia awareness
The Alzheimer's Society is running events across England, Wales and Northern Ireland, during Dementia Awareness Week.
BBC: Carey Mulligan supports bid to raise dementia awareness
The Alzheimer's Society has welcomed the survey and said it backs its research about the wishes of dementia sufferers.
According to the Alzheimer's Society, there are 37, 000 people with dementia in Wales.
Dr Susanne Sorenson, head of research at the Alzheimer's Society, agreed that this could be a useful indicator for doctors.
George McNamara, of the Alzheimer's Society, said people with the condition were being denied the quality of life they deserved.
Professor Clive Ballard of the Alzheimer's Society agreed that more research was now needed to establish why the link exists.
The Alzheimer's Society has urged the public to visit their roadshow which starts a tour of Northern Ireland this week.
Belfast has the highest diagnosis rate of dementia in the UK, according to new figures released by the Alzheimer's Society.
He became a supporter of the Alzheimer's Society and helped raise the charity's profile at fundraising events across the country.
The Alzheimer's Society estimates there are 45, 000 people in Cornwall, Devon, Dorset and Somerset with dementia, including those without a diagnosis.
BBC: Devon MP Ben Bradshaw says dementia not properly diagnosed
Comedians Jo Brand and Meera Syal have become two of England's first 'dementia friends', in an initiative launched by the Alzheimer's Society.
BBC: Comedians Meera Syal and Jo Brand are 'dementia friends'
The Alzheimer's Society said the safeguards help protect human rights, but that it was concerned about the uneven use of them across the country.
The Alzheimer's Society said that a large rise in the capital threshold could take thousands of people "out of the firing line" for huge costs.
The Alzheimer's Society is issuing new guidance calling on doctors to think much harder before prescribing antipsychotics, and to look at prescribing pain medication instead.
The Alzheimer's Society said of the 13, 500 people with dementia in Devon, the option of housing with on-site care and support would be welcomed by some.
The actress, who was nominated for an Oscar for her performance in the film "An Education", will promote this message through her new role with the Alzheimer's Society.
BBC: Carey Mulligan supports bid to raise dementia awareness
Dr Susanne Sorensen, head of research at the Alzheimer's Society, said that the findings were particularly interesting in relation to Lewy body dementia, which accounts for only 4% of dementia cases.
Representatives from the Alzheimer's Society and Parkinson's UK Cymru stressed the need for early diagnosis of the illnesses said that staff should be trained to deal with these illnesses as there are so many sufferers currently in the care system.
Research by London School of Economics and King's College London commissioned by the Alzheimer's Society found Cardiff and Swansea have the highest number of people with dementia, while Ceredigion and Powys will see some of the biggest growth in the condition.
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