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Table 1 Different stages of MCI/AD

From: A systematic review on machine learning and deep learning techniques in the effective diagnosis of Alzheimer’s disease

There are five stages associated with Alzheimer's disease:

1

Preclinical Alzheimer's disease

2

Mild cognitive impairment (MCI)

3

Mild dementia

4

Moderate dementia

5

Severe dementia due to Alzheimer's disease