36 million people in the world have dementia (Banerjee, 2012)
It will double by 2030 and there will be 115 million with dementia by 2050
The social cost is enormous - US$600 billion per year (bigger than the biggest company of the world and biggest than cancer, diabetes, etc., i.e., around 1% of the world's economy, equivalent to the 18th biggest economy of the world)
60% of the costs of aging care are due to dementia
Here is a description of some of the more well-known types of dementia (Access Economics, 2009) -
Alzheimer’s Disease, most common and usually affects the temporal lobes of the brain with consequent deterioration in memory,
Vascular Dementia, caused by mini strokes and more sudden onset than Alzheimers, can occur anywhere in the brain,
Dementia with Lewy Bodies (abnormal proteins form in certain areas of the brain) tends to affect the visual cortex among other areas of the brain,
Frontal Lobe and Fronto-Temporal Dementia (eg Pick’s Disease where abnormal amounts of tau protein form in nerve cells)
Alcohol-related Dementia (Korsakoff’s Syndrome)
Parkinsons Disease (affects nerve cells’ production of dopamine, which affects muscle movement and balance)
Huntingtons Disease is usually hereditary (behaviour changes such as irritability, moodiness, restlessness, paranoia and psychosis may be evident before movement problems emerge such as jerking movements, unsteady walking, involuntary facial movement)
Quality of life (QOL) is unrelated to severity of dementia. However, there is considerable variability in QOL. Quality of understanding, diagnosis, and care then are important aspects of the health and well-being of those with dementia.