Alzheimer's disease (AD) is one of the most common cause of mental decline or dementia in older individuals. Alzheimer's disease can cause problems with memory, thinking and behaviour. With time the symptoms worsen and they can become severe enough to interfere with daily tasks. If you or any member of your family is diagnosed with Alzheimer’s, your doctor will try to categorise the disease. Knowing which stage of Alzheimer's disease you are suffering from, can help you to understand the progression of Alzheimer’s symptoms and help the doctor to plan appropriate care. However, all individuals with Alzheimer’s do not progress at the same rate. The time in each stage and the rate of progress of symptoms vary widely from patient to patient, and the symptoms of Alzheimer’s can also vary considerably (that is everyone with Alzheimer’s does not experience all the symptoms).
Based on the symptoms Alzheimer’s disease can be categorised in 3 stages:
This stage lasts 2-4yrs and the symptoms may include:
This stage lasts 2-10yrs and the symptoms may include:
This is the most severe stage and may last for 1 to more than 3 yrs. The symptoms may include:
Besides this way of categorising AD, there are other ways such as the seven stages Global Deterioration Scale, also known as the Reisberg Scale. Alzheimer's disease usually progresses slowly and the person may pass through the various stages over 8 to 15 years (sometimes as long as 25 years).
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