A disease-modifying treatment should start early
There are three stages associated with Alzheimer’s disease: Mild Cognitive Impairment (MCI) due to Alzheimer’s disease, mild to moderate Alzheimer’s and severe Alzheimer’s disease. It is, however, very difficult to fully separate these stages. Sometimes they are also referred as early, middle and late; or mild, moderate and severe, Alzheimer’s.
Alzheimer’s disease starts several years before the individual exhibits any clinical symptoms. The disease also develops progressively, which means that the symptoms increase as the disease progresses into full dementia. A disease-modifying treatment should preferably be started as early as possible, before the deterioration of the brain has progressed too far (Alzheimers Association).