Dementia is an age related mental illness which is progressive and degenerative. It generally occurs at an older age. Some people get it between 70 to 80 years while others may even get it in the mid sixties.

How long one lives with dementia is a difficult to answer. It all depends on what type of dementia the person is suffering from and what stage he is. If we consider dementia in general, it also depends on the sex of the person. Women in general have greater lifespans than men. So, if a woman gets affected with dementia she may live a little longer than a man in the same state.

There are basically two broad categories of dementia one is called the Alzheimer’s and the other one is the vascular dementia. Alzheimer’s is the first leading cause of dementia deaths and vascular dementia is the next cause. When somebody is diagnosed with Alzheimer’s disease chances of survival remains less and reduces as the disease progresses. Alzheimer’s is caused due to abnormal formation of two structures in the brain. These structures develop inside the nerve cells, thus causing them to die. This destruction of brain cells reduces the person’s thinking ability, memory and impairs his cognitive skills.

A senior, who is suffering from advance stages of Alzheimer’s disease may just live for few months before the body falls prey to infections. Whereas a person, who is in the initial stages of the disease, may just survive for another four to five years. Those are diagnosed with vascular dementia, the lifespan reduces as the small strokes in the brain keep blocking the blood supply to the brain, and thereby worsening the condition.

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