Alzheimer’s disease is a progressive form of dementia. Dementia is a broader term for conditions caused by brain injuries or diseases that negatively affect your memory, thinking, and behavior. These changes interfere with daily living.

According to the , Alzheimer’s disease accounts for 60 to 80 percent of dementia cases. Most people with the disease are diagnosed after age 65. If you’re diagnosed with it before then, it’s generally referred to as early-onset Alzheimer’s disease.