“We know that age is the biggest risk factor for dementia and we know that Australia's population is ageing.” For people aged older than 65, the risk of developing dementia doubles every five or six years. There were 401,300 Australians with dementia in 2022, the AIHW estimated, a 4% increase from 2021.
Population growth and population aging are the main reasons behind a large rise in global dementia cases. The world population is projected to reach 8.5 billion in 2030 and increase further to 9.7 billion in 2050 and 11.2 billion by 2100.
Alzheimer's disease is the most common form of dementia. Alzheimer's disease is a physical brain condition resulting in impaired memory, thinking and behaviour.
Alzheimer's disease accounts for 60-80% of cases. Vascular dementia, which occurs because of microscopic bleeding and blood vessel blockage in the brain, is the second most common cause of dementia. Those who experience the brain changes of multiple types of dementia simultaneously have mixed dementia.
Nearly two-thirds of Australians with dementia are women. With an ageing and growing population, it is predicted that the number of Australians with dementia will more than double by 2058 to 849,300 people (533,800 women and 315,500 men) (Figure 1).
In addition, highly intelligent people have been found, on average, to show clinical signs of Alzheimer's later than the general population. Once they do, they decline much faster. Thought to reflect their greater mental reserves, this different pattern may call for a different approach to diagnosis.
The biggest risk factor for dementia is ageing. This means as a person gets older, their risk of developing dementia increases a lot. For people aged between 65 and 69, around 2 in every 100 people have dementia. A person's risk then increases as they age, roughly doubling every five years.
Many people affected by dementia are concerned that they may inherit or pass on dementia. The majority of dementia is not inherited by children and grandchildren. In rarer types of dementia there may be a strong genetic link, but these are only a tiny proportion of overall cases of dementia.
While sugar consumption does not directly cause dementia, it can affect it. As mentioned earlier, consuming too much sugar can lead to health issues that increase the risk of developing dementia. Diets high in sugar have been linked to reduced cognitive functioning and memory problems in older adults.
The current evidence indicates that while chronic stress may play a role in the development or progression of dementia, it does not necessarily cause dementia.
Excessive alcohol consumption over a lengthy time period can lead to brain damage, and may increase your risk of developing dementia. However, drinking alcohol in moderation has not been conclusively linked to an increased dementia risk, nor has it been shown to offer significant protection against developing dementia.
As scientists around the world seek solutions for Alzheimer's disease, a new study reveals that two indigenous groups in the Bolivian Amazon have among the lowest rates of dementia in the world. An international team of researchers found among older Tsimane and Moseten people, only about 1% suffer from dementia.
The causes probably include a combination of age-related changes in the brain, along with genetic, environmental, and lifestyle factors. The importance of any one of these factors in increasing or decreasing the risk of Alzheimer's disease may differ from person to person.
Administration: The examiner reads a list of 5 words at a rate of one per second, giving the following instructions: “This is a memory test. I am going to read a list of words that you will have to remember now and later on. Listen carefully. When I am through, tell me as many words as you can remember.
The average life expectancy figures for the most common types of dementia are as follows: Alzheimer's disease – around eight to 10 years. Life expectancy is less if the person is diagnosed in their 80s or 90s. A few people with Alzheimer's live for longer, sometimes for 15 or even 20 years.
Can single-gene dementias be inherited directly? Yes. If a single-gene dementia is present in a family, it is quite likely that a person from that family will develop dementia: If one of the parents carries the changed gene, each child has a 1 in 2 chance of inheriting it.
What are the foods that fight memory loss? Berries, fish, and leafy green vegetables are 3 of the best foods that fight memory loss. There's a mountain of evidence showing they support and protect brain health.
The Mini-Cog test.
A third test, known as the Mini-Cog, takes 2 to 4 minutes to administer and involves asking patients to recall three words after drawing a picture of a clock. If a patient shows no difficulties recalling the words, it is inferred that he or she does not have dementia.
Best Foods for Preventing Dementia
Food that are rich in carotenoids include carrots, squash, sweet potatoes, bell peppers, tomatoes, papaya, apricots, and leafy greens such as spinach and kale.
People in the early stages of dementia may understand their diagnosis and its implications. However, it is important to note that dementia affects every person differently and that symptoms vary between people. In the later stages of dementia, individuals may not be aware of their condition.