At this stage the person with Alzheimer's disease is totally dependent and inactive. Memory problems are very serious and the affected person becomes increasingly disabled physically. Early stage At this stage the dementia can often be overlooked and incorrectly diagnosed as 'old age'. Because onset is gradual, it is difficult to identify exactly when Alzheimer's disease begins. By now the person with Alzheimer's disease is totally dependent and inactive.
Memory problems are very serious, with the person becoming increasingly physically disabled as well.